Man pages matching name ibv_init_ah_from_wc in section 3:

ibv_init_ah_from_wc.3.en	debian 10 / libibverbs-dev
ibv_init_ah_from_wc.3.en	debian 11 / libibverbs-dev
ibv_init_ah_from_wc.3.en	debian 12 / libibverbs-dev