1901 census has

Baljean, Laxey, Lonan (Dist 6) RG13/5307 f.82 p.26 Sch.171
Louisa Callin, head. wid, 27 born Lonan, speaks English
Alexander ", son, 4, Lonan, Eng.
Mabel L. ", daur, 3, Lonan, English

This gives an approximate d.o.b. of 1874 in Lonan for Louisa

1891 census has:

Balladhoo Farm, Lonan (dist 5) RG12/4686 f.69 p.3 sch.16
John J Kelly, h, mar, 45, Farmer, Laxey
Elizabeth ", wife, m, 45, Andreas
Louisa/Louiser* ", daur, s, 17, assistant on Farm, Laxey
Frances J ", daur, 13, do., Laxey
Thomas E Kelly, son, 9, scholar, Lancashire (Ash~~?)
Emily S ", daur, 6, do., do.
Herbert S. ", son, 3 IOM Douglas

*Ancestry has 'Louisn', understandably.

IGI extracted record:

Louisa Kelly, d/o Robert Kelly & Mary Ann Kelly c. 22 Feb 1874 Laxey

Brian Lawson's Births index has:

Louisa Jane 4 Jun 1874 Lon 132 d/o John James Kelly & Elizabeth Looney
plus
Frances Jemima 22 Dec 1877 Lon 154 d/o John James Kelly & Elizabeth Looney
Herbert Stanley 6 Aug 1887 Dou 653 s/o John James Kelly & Elizabeth Looney

which match with the above 1891 census. A look at Louisa & Sandy's marriage record should of course confirm her father.

Hope that helps.