The story
- Old Norse · derived fromsíl
- English todaysillock
From sill (“newly hatched young of fish, fry”) + -ock, ultimately from Old Norse síl, síld (“herring”), whence also dialectal Swedish sil (“the young of fish, fry”) and Norwegian sil (“sand-eel”). More at sile.
Words from the same roots
Old Norsesíl all →
sile
Etymology from Wiktionary, CC BY-SA 4.0.