Where does “Betuloideae” come from?

Betuloideae (Translingual) comes from Translingual Betula, from Latin betula, from Gaulish bitu, from Proto-Celtic betwiyos, from Proto-Indo-European gʷét-.

Ancestry of “Betuloideae”, step by step

Step	Language	Word	Meaning
1	Translingual	Betula	—
2	Latin	betula	birch tree
3	Gaulish	bitu	—
4	Proto-Celtic	betwiyos	—
5	Proto-Indo-European	gʷét-	—

Every word from Proto-Indo-European gʷét- →