Hi Cath,
Edna May Scarffe's mother was Helena Susannah Scarffe 1879-1944. Helena Susannah was the daughter of Thomas Scarffe 1838-1904 and Esther Kneale 1843-86 [my gt gt gparents]. Here are his entire Census Returns: -
1841 Census, IoM; HO_107_1464/2_36_p8; Ballamylgen: Thomas Scarffe, 25, Lab in Lead Mines; Catharine Scarffe, 20; Thomas Scarffe, 3; Eleanor Scarffe, 1; all b.IoM.

1851 Census, IoM; Lonan_1_151; Ballacowle: Thomas Scarffe, Head, Mar, 39, Lead Ore Miner; Catherine Scarffe, Wife, Mar, 42; Thomas Scarffe, Son, U, 13; Ellen Scarffe, Dau, 11; John Scarffe, Son, 8; Isabella Scarffe, Dau, 6; William Scarffe, Son, 2; all b.Lonan.

1861 Census, IoM; RG_09_4423_18b; Lonan_1_146; 14, Laxey Mines: Thomas Scarff, Head, M, 45, Labr; Catherine, Wife, M, 51; Thomas, Son, Un, 23, Labr; Ellen, Dau, Un, 21, Servant; John J, Son, 17, Labr; Isabelle, Dau, 15, Scholar; William J, Son, 12, Scholar; Robert B, Son, 7, Scholar; all b.Lonan.

1871 Census IoM; RG_10_5774_61b; Lonan_3_108; Laxey Mines: Thomas Scarfe, Head, M, 33, Lead Miner; Esther Scarfe, wife, M, 28; Alfred, Son, 6, Scholar; Jemetta, Dau, 4; William, Son, 2; Edmund, Son, 9m.

1881 Census IoM; RG_11_5601_49_p13; Lonan; Cronk-e-Chule Cottage: Thomas Scarffe, Head, M, 43, b.Lon, Lead Miner; Esther Scarffe, Wife, M, 38, b.Andreas; Alfred, Son, U, 16, Labr at Lead Mines; William, Son, 12, Schlr; Edmund, Son, 10, Schlr; Ann Jane, Dau, 8, Schlr; James, Son, 6, Schlr; John, Son, 5; Helena, Dau, 2; Isaac, Son, 1m; all b.Lonan

RG_11_5602_25a_p5; Onchan; Bibaloe Beg: Phillip Creer, Head, U, 48, b.Marown, Farmer 119 acres;……..[..]……….Jemima Scarff, Serv, U, 14, b.Lonan, General Serv Dom

1891 Census, IoM; RG_12_4686_8b; Lonan_1_45; Big Wheel: Thomas Scarffe, Head, Widr; 53; Lead Miner; William, Son, 22, Lead Miner; Edmund, Son, S, 20, Lead Miner; James, Son, S,16, Surface worker at Mines; John, Son, 14, Scholar; Helena, Dau, 12, Scholar; Isaac, Son, 10, Scholar; all b.IoM.

1901 Census, IoM; RG_13_5307_54a; Lonan_5_1; Big Wheel: Thomas Scarffe, Head, Widr, 62, Lead ore Miner; James, Son, S, 26, Lead ore Miner; Helena, Dau, S, 20; Isaac, Son, S, 20, Lead ore Miner; all b.Lonan.

I have more data on the family back to ca 1643; my e-mail is laxeymann [at] ntlworld [dot] com.
Rgds
JohnL