Where does “insulandus” come from?

insulandus (Latin) comes from Latin insulo, from Latin Īnsula, from Proto-Italic enselā.

Definitions

Step	Language	Word	Meaning
1	Latin	insulo	I make into an island
2	Latin	Īnsula	—
3	Proto-Italic	enselā	—

insulandus — Etymology, Origin & Word History | Etymology Explorer