Variant of Gavin, from Welsh 'gwalchwyn' meaning 'white hawk'; associated with Arthurian knight Gawain.
Gavian is a variant of Gavin and derives from Welsh elements associated with the white hawk, with additional resonance from the Arthurian knight Gawain. That gives the name a strong image: a bird of prey, a chivalric world, and a lineage of northern British legend.
It feels both natural and heroic, which is a rare combination. As a personal name, Gavian has a sturdy and slightly elevated tone. It sounds familiar enough to be accessible, but unusual enough to stand apart from Gavin.
The hawk imagery lends it speed, keen sight, and a certain athletic clarity, while the Arthurian association adds nobility. Gavian is one of those names that feels like it has an old story behind it, even when used in a modern setting.