Släkthistoria för Mothersill
Mothersill Vad efternamn betyder
from an abbreviated form of the Middle English oath bi min moderes saule (or soule) ‘by my mother's soul’. Compare James Fadersall (‘by my father's soul’) 1486 in York Freemen's Register . In NR Yorks the name was altered to Mothersill and then to Mothersdill and Mothersdale through false association with the many -dale place-names and surnames in that part of the world.
Källa: The Oxford Dictionary of Family Names in Britain and Ireland, 2016
