Bomfur is the name given to them at birth – and Bombur actually chose it. He wanted at least one of his kids to be named for his parents.
(aaaaaand that’s because Bombur had been brought up and had lived in Longbeard society his whole life, with their hereditary family names passed down through the lines, etc. It didn’t seem so out of the norm, though it wasn’t strictly a Broadbeam tradition…)
Oh, I should mention… For the confused – Bomfa is genderfluid! She will accept he/she/they pronouns, and generally braids their beard to show if it is a Bomfa day, or a Bomfur day. They have dyed their moustache a deep emerald green, to show that they are outside the binary. On Bomfa days she braids it full and thick streaming down her chest, with little feminine ringlets and plenty of ringing bells, and paints her eyes and lips in whatever colours she pleases. On Bomfur days it gets coiled in a massive thick plait around his neck, and he wears his Broadbeam-patterned ear-cuffs. And when it’s a day that feels like neither (or both!) Bomf just braids that green moustache in a loop under their nose, and that’s that.
They are also one hell of a silversmith, and to have a piece made by Bomf is to commission a real work of art. Every single thing she makes is totally a reflection of their client’s taste and style and personality. She has a knack for always getting it spot on 😉