Where does “Pajarito” come from?

Pajarito (Tagalog) comes from Spanish Pajarito, from Spanish pájaro, from Old Spanish páxaro, from Vulgar Latin passarum, from Latin passer, from Proto-Indo-European peth₂- — to spread out; to fly.

Ancestry of “Pajarito”, step by step

Step	Language	Word	Meaning
1	Spanish	Pajarito	bowtie
2	Spanish	pájaro	bird; homosexual; penis
3	Old Spanish	páxaro	—
4	Vulgar Latin	passarum	genitive feminine plural of passus
5	Latin	passer	sparrow; turbot
6	Proto-Indo-European	peth₂-	to spread out; to fly

Every word from Proto-Indo-European peth₂- →Every word from Latin passer →Every word from Vulgar Latin passarum →