Charles appears to be the son of John Crellin and Isabella Kelly. He was christened in the parish of German 23 Sept 1810 and had brothers Caesar 1805 and Edward 1807 together with sister Elizabeth 1813.
Charles married Catherine Quirk 4 Jan 1849 in the parish of Marown and had 5 children.

John 1851 (probably died young )
John Edward 1865
Catherine Margaret 1857 (married Edward Creer 1879)
Rebecca Ann 1855
William ( may have gone fishing)

By 1881 census:

Charles Crellin, Miller 70 German
Catherine M Crellin 55 Braddan
John E Crellin 15 German
Rebecca A. Crellin 25 Braddan
Margaret S. Quirk 9 Braddan, Niece

Len Faragher