Fenwick Name Meaning
English (northern) and Scottish: habitational name from either of two places in Northumberland or from one in Yorkshire all of which are so named from Old English fenn ‘marsh fen’ + wīc ‘outlying dairy farm’. There is also a place in Ayrshire Scotland which has the same name and origin. This last is the source of at least some early examples of the surname: Nicholaus Fynwyk was provost of Ayr in 1313 and Reginald de Fynwyk or Fynvyk appears as bailie and alderman of the same burgh in 1387 and 140 The name is usually pronounced ‘Fennick’.
Source:
Dictionary of American Family Names 2nd edition, 2022
Similar surnames:
Renwick, Beswick, Bewick, Barwick, Harwick, Senick, Goswick, Herwick
From: https://www.ancestry.co.uk/learn/facts