Where does “lado” come from?

lado (Bikol Central) comes from Spanish lado, from Old Spanish lado, from Latin lātus, from Latin cauda, from Proto-Italic kaudā, from Proto-Indo-European keh₂udeh₂.

Ancestry of “lado”, step by step

Step	Language	Word	Meaning
1	Spanish	lado	side; face
2	Old Spanish	lado	side
3	Latin	lātus	wide, broad
4	Latin	cauda	A tail
5	Proto-Italic	kaudā	tail
6	Proto-Indo-European	keh₂udeh₂	—

Every word from Proto-Indo-European keh₂udeh₂ →Every word from Proto-Italic kaudā →Every word from Latin cauda →