Adrienne, If 'your William' is the son of Silvester (died 1732 - Summary of his will in Frances's Manx Notebook) it is the Balladda, Dalby line.
Caution; Living in Alia Dalby at the same time as Silvester. William Kelly and his wife Ales (Alice) als Clator.
Reference: Liber Assed 1709. RB 642 Page 162