Where does “aiwestom” come from?

aiwestom (Proto-Celtic) comes from Proto-Indo-European h₂ey- — vital force, life, age, eternity; day, morning.

aiwestom (Proto-Celtic): age; lifetime; era

Definitions

Step	Language	Word	Meaning
1	Proto-Indo-European	h₂ey-	vital force, life, age, eternity; day, morning

aiwestom — Etymology, Origin & Word History | Etymology Explorer