Where does “alaŭdo” come from?

alaŭdo (Esperanto) comes from Latin alauda, from Gaulish *alawda.

alaŭdo (Esperanto): lark

Definitions

Step	Language	Word	Meaning
1	Latin	alauda	A lark; the crested lark, the skylark
2	Gaulish	*alawda	—

alaŭdo — Etymology, Origin & Word History | Etymology Explorer