There may have been daughters but I'm struggling to work that out.

Yes - a twin to Daniel

1841 Census Isle of Man
HO107; Piece: 1464; Page: 1

Sulby Village, Lezayre
Thomas Fargher 55 Weaver
Isabella Fargher 45
Isabella Fargher 15
Daniel Fargher 15 Joiners Ap (rentice)
Robt Fargher 11
William Fargher 7

1861 Census
Gob-e-Volley, Lezayre
Thomas Fargher 80 Woollen Weaver Lezayre
William C Fargher 26 Joiner Lezayre
Elizabeth Wade 27 House Servant Andreas

Burials,
FARAGHER Thomas, Sulby, Lezayre Close-Vollay. 86 yrs 27 March 1867
FARAGHER Isabella als CRAINE Gob-y-Volley. 67 yrs 28 August 1860
FARAGHER William Curphey, Close-e-Volley, Sulby. 87 yrs 13 November 1920

and a WILL for Thomas
FARAGHER, Thomas 1867 Lezayre A(Archdeacon) number: 63 - LDS film number: 0106269

The Daughter, Isabella - maybe named in his WILL.

just helping, not related,

Averil