There is a rare dyad of Horus and Min (named son of Isis of Koptos) at University College, London1 and the British Museum has a rare dyad of Horus and Osiris2
Copper alloy dyad of Min and Horus on a plinth H 4.1, W 2.2
Late Period © 2017 University College London LDUCE-UC #52623
Ivory dyad of Horus and Osiris with back pillar on a plinth
H 4.6, W 2.4, D 1.2 Third Intermediate Period
© The Trustees of the British Museum #EA60736
References
1Petrie W F M. Amulets, 1914, p. 37 and Fig. 160
2Andrews C. Amulets of Ancient Egypt 1994, Fig. 13a