There are eight groups of Willans, one of Willens, and one Willan, with four having more than 30 named descendants.
1 The Willans ‘L group’ headed by Henry and Elizabeth, rearing three children at Harrow-on-the-Hill Middlesex, has 105 named descendants.
2 The Willans ‘Ob group’ from Leeds Yorkshire was headed by Obadiah and Elizabeth Jackson. This group has 105 named descendants.
3 The Willans ‘RH group’ from Hunslet Yorkshire is hypothesised to be from William Willans b~1672 & Susanna Rhodes. This group has 170 named descendants, one of whom was UK Prime Minister Herbert Henry Asquith.
4 The Willans ‘LH group’ from Hackney Middlesex has 26 named descendants.
5 The Willans ‘OH group’ from Hunslet Yorkshire has 24 named descendants.
6 The Willans ‘OV group’ from Hunslet Yorkshire has 25 named descendants.
7 The Willans ‘U group’ from Haddington near Edinburgh has 20 named descendants.
8 The Willans ‘R group’ from Wragby Yorkshire has 25 named descendants.
9 The Willens ‘G group’ from Glasgow has 20 named descendants. 10 The Willan ‘T group’ headed by William b~1798 and Hannah at Kirkby Lonsdale Westmorland Cumbria has 130 named descendants. One of their grandsons, James Willan b1875, migrated to Melbourne Australia.