The story
- Old Norse · derived frommágr“son-in-law”
- English todayMowson
From the unattested Middle English word *maugh, *maw, *mough, *mow, from Old Norse mágr (“son-in-law”), + -son. It could also be a variant of Mawson and Moulson.
Etymology from Wiktionary, CC BY-SA 4.0.