diff --git a/layouts/default/split_3x5_3/default_split_3x5_3/keymap.c b/layouts/default/split_3x5_3/default_split_3x5_3/keymap.c
new file mode 100644
index 00000000000..8dca359be99
--- /dev/null
+++ b/layouts/default/split_3x5_3/default_split_3x5_3/keymap.c
@@ -0,0 +1,24 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+     /*
+      * ┌───┬───┬───┬───┬───┐       ┌───┬───┬───┬───┬───┐
+      * │ Q │ W │ E │ R │ T │       │ Y │ U │ I │ O │ P │
+      * ├───┼───┼───┼───┼───┤       ├───┼───┼───┼───┼───┤
+      * │ A │ S │ D │ F │ G │       │ H │ J │ K │ L │ ; │
+      * ├───┼───┼───┼───┼───┤       ├───┼───┼───┼───┼───┤
+      * │ Z │ X │ C │ V │ B │       │ N │ M │ , │ . │ / │
+      * └───┴───┴───┴───┴───┘       └───┴───┴───┴───┴───┘
+      *           ┌───┐                   ┌───┐
+      *           │GUI├───┐           ┌───┤Alt│
+      *           └───┤Bsp├───┐   ┌───┤Ent├───┘
+      *               └───┤   │   │   ├───┘
+      *                   └───┘   └───┘
+      */
+    [0] = LAYOUT_split_3x5_3(
+        KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                               KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,
+        KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                               KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN,
+        KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                               KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,
+                                   KC_LGUI, KC_BSPC, KC_SPC,           KC_SPC,  KC_ENT,  KC_RALT
+    )
+};
diff --git a/layouts/default/split_3x5_3/info.json b/layouts/default/split_3x5_3/info.json
new file mode 100644
index 00000000000..87e5c170d1e
--- /dev/null
+++ b/layouts/default/split_3x5_3/info.json
@@ -0,0 +1,56 @@
+{
+    "keyboard_name": "3x5+3 split layout",
+    "url": "",
+    "maintainer": "qmk",
+    "width": 12,
+    "height": 4.75,
+    "layouts": {
+        "LAYOUT_split_3x5_3": {
+            "layout": [
+                {"x":0, "y":0.25},
+                {"x":1, "y":0.125},
+                {"x":2, "y":0},
+                {"x":3, "y":0.125},
+                {"x":4, "y":0.25},
+
+                {"x":7, "y":0.25},
+                {"x":8, "y":0.125},
+                {"x":9, "y":0},
+                {"x":10, "y":0.125},
+                {"x":11, "y":0.25},
+
+                {"x":0, "y":1.25},
+                {"x":1, "y":1.125},
+                {"x":2, "y":1},
+                {"x":3, "y":1.125},
+                {"x":4, "y":1.25},
+
+                {"x":7, "y":1.25},
+                {"x":8, "y":1.125},
+                {"x":9, "y":1},
+                {"x":10, "y":1.125},
+                {"x":11, "y":1.25},
+
+                {"x":0, "y":2.25},
+                {"x":1, "y":2.125},
+                {"x":2, "y":2},
+                {"x":3, "y":2.125},
+                {"x":4, "y":2.25},
+
+                {"x":7, "y":2.25},
+                {"x":8, "y":2.125},
+                {"x":9, "y":2},
+                {"x":10, "y":2.125},
+                {"x":11, "y":2.25},
+
+                {"x":2.5, "y":3.25},
+                {"x":3.5, "y":3.5},
+                {"x":4.5, "y":3.75},
+
+                {"x":6.5, "y":3.75},
+                {"x":7.5, "y":3.5},
+                {"x":8.5, "y":3.25}
+            ]
+        }
+    }
+}
diff --git a/layouts/default/split_3x5_3/layout.json b/layouts/default/split_3x5_3/layout.json
new file mode 100644
index 00000000000..42bf03fd7af
--- /dev/null
+++ b/layouts/default/split_3x5_3/layout.json
@@ -0,0 +1,12 @@
+[{x:2,a:7},"",{x:6},""],
+[{y:-0.875,x:1},"",{x:1},"",{x:4},"",{x:1},""],
+[{y:-0.875},"",{x:3},"",{x:2},"",{x:3},""],
+[{y:-0.25,x:2},"",{x:6},""],
+[{y:-0.875,x:1},"",{x:1},"",{x:4},"",{x:1},""],
+[{y:-0.875},"",{x:3},"",{x:2},"",{x:3},""],
+[{y:-0.25,x:2},"",{x:6},""],
+[{y:-0.875,x:1},"",{x:1},"",{x:4},"",{x:1},""],
+[{y:-0.875},"",{x:3},"",{x:2},"",{x:3},""],
+[{x:2.5},"",{x:5},""],
+[{y:-0.75,x:3.5},"",{x:3},""],
+[{y:-0.75,x:4.5},"",{x:1},""]
diff --git a/layouts/default/split_3x5_3/readme.md b/layouts/default/split_3x5_3/readme.md
new file mode 100644
index 00000000000..dd73c69867c
--- /dev/null
+++ b/layouts/default/split_3x5_3/readme.md
@@ -0,0 +1,5 @@
+# split_3x5_3
+
+    LAYOUT_split_3x5_3
+
+Layout for split keyboards with 3x5 keys and three thumb keys per hand. Examples include the Minidox, Centromere Mini, and Gergoplex.
diff --git a/layouts/default/split_3x6_3/default_split_3x6_3/keymap.c b/layouts/default/split_3x6_3/default_split_3x6_3/keymap.c
new file mode 100644
index 00000000000..f014d88eb3a
--- /dev/null
+++ b/layouts/default/split_3x6_3/default_split_3x6_3/keymap.c
@@ -0,0 +1,24 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+     /*
+      * ┌───┬───┬───┬───┬───┬───┐       ┌───┬───┬───┬───┬───┬───┐
+      * │Tab│ Q │ W │ E │ R │ T │       │ Y │ U │ I │ O │ P │Bsp│
+      * ├───┼───┼───┼───┼───┼───┤       ├───┼───┼───┼───┼───┼───┤
+      * │Ctl│ A │ S │ D │ F │ G │       │ H │ J │ K │ L │ ; │ ' │
+      * ├───┼───┼───┼───┼───┼───┤       ├───┼───┼───┼───┼───┼───┤
+      * │Sft│ Z │ X │ C │ V │ B │       │ N │ M │ , │ . │ / │Sft│
+      * └───┴───┴───┴───┴───┴───┘       └───┴───┴───┴───┴───┴───┘
+      *               ┌───┐                   ┌───┐
+      *               │GUI├───┐           ┌───┤Alt│
+      *               └───┤Bsp├───┐   ┌───┤Ent├───┘
+      *                   └───┤   │   │   ├───┘
+      *                       └───┘   └───┘
+      */
+    [0] = LAYOUT_split_3x6_3(
+        KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                               KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+        KC_LCTL, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                               KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                               KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT,
+                                            KC_LGUI, KC_BSPC, KC_SPC,           KC_SPC,  KC_ENT,  KC_RALT
+    )
+};
diff --git a/layouts/default/split_3x6_3/info.json b/layouts/default/split_3x6_3/info.json
new file mode 100644
index 00000000000..b1ca28168bf
--- /dev/null
+++ b/layouts/default/split_3x6_3/info.json
@@ -0,0 +1,62 @@
+{
+    "keyboard_name": "3x6+3 split layout",
+    "url": "",
+    "maintainer": "qmk",
+    "width": 14,
+    "height": 4.75,
+    "layouts": {
+        "LAYOUT_split_3x6_3": {
+            "layout": [
+                {"x":0, "y":0.25},
+                {"x":1, "y":0.25},
+                {"x":2, "y":0.125},
+                {"x":3, "y":0},
+                {"x":4, "y":0.125},
+                {"x":5, "y":0.25},
+
+                {"x":8, "y":0.25},
+                {"x":9, "y":0.125},
+                {"x":10, "y":0},
+                {"x":11, "y":0.125},
+                {"x":12, "y":0.25},
+                {"x":13, "y":0.25},
+
+                {"x":0, "y":1.25},
+                {"x":1, "y":1.25},
+                {"x":2, "y":1.125},
+                {"x":3, "y":1},
+                {"x":4, "y":1.125},
+                {"x":5, "y":1.25},
+
+                {"x":8, "y":1.25},
+                {"x":9, "y":1.125},
+                {"x":10, "y":1},
+                {"x":11, "y":1.125},
+                {"x":12, "y":1.25},
+                {"x":13, "y":1.25},
+
+                {"x":0, "y":2.25},
+                {"x":1, "y":2.25},
+                {"x":2, "y":2.125},
+                {"x":3, "y":2},
+                {"x":4, "y":2.125},
+                {"x":5, "y":2.25},
+
+                {"x":8, "y":2.25},
+                {"x":9, "y":2.125},
+                {"x":10, "y":2},
+                {"x":11, "y":2.125},
+                {"x":12, "y":2.25},
+                {"x":13, "y":2.25},
+
+                {"x":3.5, "y":3.25},
+                {"x":4.5, "y":3.5},
+                {"x":5.5, "y":3.75},
+
+                {"x":7.5, "y":3.75},
+                {"x":8.5, "y":3.5},
+                {"x":9.5, "y":3.25}
+            ]
+        }
+    }
+}
diff --git a/layouts/default/split_3x6_3/layout.json b/layouts/default/split_3x6_3/layout.json
new file mode 100644
index 00000000000..c1256eed98a
--- /dev/null
+++ b/layouts/default/split_3x6_3/layout.json
@@ -0,0 +1,12 @@
+[{x:3,a:7},"",{x:6},""],
+[{y:-0.875,x:2},"",{x:1},"",{x:4},"",{x:1},""],
+[{y:-0.875},"","",{x:3},"",{x:2},"",{x:3},"",""],
+[{y:-0.25,x:3},"",{x:6},""],
+[{y:-0.875,x:2},"",{x:1},"",{x:4},"",{x:1},""],
+[{y:-0.875},"","",{x:3},"",{x:2},"",{x:3},"",""],
+[{y:-0.25,x:3},"",{x:6},""],
+[{y:-0.875,x:2},"",{x:1},"",{x:4},"",{x:1},""],
+[{y:-0.875},"","",{x:3},"",{x:2},"",{x:3},"",""],
+[{x:3.5},"",{x:5},""],
+[{y:-0.75,x:4.5},"",{x:3},""],
+[{y:-0.75,x:5.5},"",{x:1},""]
diff --git a/layouts/default/split_3x6_3/readme.md b/layouts/default/split_3x6_3/readme.md
new file mode 100644
index 00000000000..07d302da8d7
--- /dev/null
+++ b/layouts/default/split_3x6_3/readme.md
@@ -0,0 +1,5 @@
+# split_3x6_3
+
+    LAYOUT_split_3x6_3
+
+Layout for split keyboards with 3x6 keys and three thumb keys per hand. Examples include the Crkbd and Centromere.