The story
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂el-o-mh₁no-
- Proto-Italic*alomanos
- Proto-Indo-European*h₂el-
- Latinalumnu
- English todayalumnus
Learned borrowing from Latin alumnus (“foster child, nourished one”).
Etymology from Wiktionary, CC BY-SA 4.0.