CD in post - can't help much with your Kewleys tho noted something strange

by SSS May 1758 90
dated 25 Jun 1756;Isabel Kewley als Clauge(widow of Wm Kewley Chirroo-doo sells for £5 (to be paid over 10yrs) to second son Stephen Kewley(now of Lonan) a parcel of intack rent 3s adj qtrland of Cherroo-doo on the inner side, to Creer's rent on lower side, Capt Oates at outer end and rangeing along by the road above inwards [??];Witt Robt Bancks, Wm Killey
(this probably explains Stephen's move back to Onchan)

This is intack #64 dating from 1725 - but in all Lib Assed thro 18th cent shown as belonging to Dan Kewley ( + his son Dan) but no deed of transfer by Stephen - Isabel d 1768 with dau Alice sole exex

maybe perusal of Lib vas might explain

maybe Philip + Cath emigrated ?