Where does “Espina” come from?

Espina (Tagalog) comes from Spanish espina, from Catalan Espina, from Latin spīna, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

Ancestry of “Espina”, step by step

Step	Language	Word	Meaning
1	Spanish	espina	thorn; fishbone; spine, backbone, spinal column
2	Catalan	Espina	thorn, spike
3	Latin	spīna	a thorn or a thorny tree or shrub, such as whitethorn, hawthorn, or blackthorn
4	Proto-Italic	speinā	thorn
5	Proto-Indo-European	spēy-	to stretch; thrive; succeed

Every word from Proto-Indo-European spēy- →Every word from Proto-Italic speinā →Every word from Latin spīna →