Man pages matching name hdf in section 3:

hdf.3.en	debian 10 / libhdf4-alt-dev
hdf.3.en	debian 10 / libhdf4-dev
hdf.3.en	debian 11 / libhdf4-alt-dev
hdf.3.en	debian 11 / libhdf4-dev
hdf.3.en	debian 12 / libhdf4-alt-dev
hdf.3.en	debian 12 / libhdf4-dev