Pihole has the option of adding custom DNS entries. I would like to add internal DNS names to my private crab-hole.  Image per https://discourse.pi-hole.net/t/howto-using-pi-hole-as-lan-dns-server/533
This issue appears to be discussing a feature request or bug report related to the repository. Based on the content, it seems to be still under discussion. The issue was opened by Empty2k12 and has received 2 comments.