qmk_firmware/quantum/keymap_extras/keymap_neo2.h

#ifndef KEYMAP_NEO2
#define KEYMAP_NEO2

#include "keymap.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_DOT DE_DOT
#define NEO_COMM DE_COMM

#define NEO_1 DE_1
#define NEO_2 DE_2
#define NEO_3 DE_3
#define NEO_4 DE_4
#define NEO_5 DE_5
#define NEO_6 DE_6
#define NEO_7 DE_7
#define NEO_8 DE_8
#define NEO_9 DE_9
#define NEO_0 DE_0
#define NEO_MINS DE_SS

#define NEO_ACUT DE_PLUS
#define NEO_GRV DE_ACUT
#define NEO_CIRC DE_CIRC

#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