qmk_firmware/quantum/keymap_extras/keymap_neo2.h

#ifndef KEYMAP_NEO2
#define KEYMAP_NEO2

#include "keymap_common.h"
#include "keymap_extras/keymap_german.h"

#define NEO_A KC_D
#define NEO_B KC_N
#define NEO_C KC_R
#define NEO_D DE_OE
#define NEO_E KC_F
#define NEO_F KC_O
#define NEO_G KC_I
#define NEO_H KC_U
#define NEO_I KC_S
#define NEO_J DE_MINS
#define NEO_K DE_Z
#define NEO_L KC_E
#define NEO_M KC_M
#define NEO_N KC_J
#define NEO_O KC_G
#define NEO_P KC_V
#define NEO_Q KC_P
#define NEO_R KC_K
#define NEO_S KC_H
#define NEO_T KC_L
#define NEO_U KC_A
#define NEO_V KC_W
#define NEO_W KC_T
#define NEO_X KC_Q
#define NEO_Y DE_AE
#define NEO_Z KC_B
#define NEO_AE KC_C
#define NEO_OE KC_X
#define NEO_UE DE_Y
#define NEO_SS DE_UE

#define NEO_L1_L KC_CAPS
#define NEO_L1_R DE_HASH

#define NEO_L2_L DE_LESS
#define NEO_L2_R DE_ALGR

#endif