Man pages matching name c_nnpntinitd in section 3ncarg:

c_nnpntinitd.3ncarg.en	debian 10 / libncarg-dev
c_nnpntinitd.3ncarg.en	debian 11 / libncarg-dev
c_nnpntinitd.3ncarg.en	debian 12 / libncarg-dev