I also descend from the Patrick Killips, with our common ancestors Patrick K & Jane KERMOD (m 1742). Their daughter Margaret b 1746 m John SCARFFE in 1769 at Lonan, and their daughter Margaret married John GELLING in 1798.

I'm reasonably confident that we descend from Patrick KILLIP who married Christian LOONEY (spelled LOANNEY) 9 May 1680. The IGI records this marriage at Ballaugh, at Braddan, and at Kirk German.

There is also a IGI marriage of a Patrick KILLIP to Katherine GELL 5 Jun 1677 at Braddan and to Katherine GILL same date at Kirk German.

The IGI has the following Ballaugh baptisms for Patrick as a father:
(These are before the 1680 marriage):
22 Sep 1668 Ballaugh Margtt KILLIP to Patt KILLIP
15 Jun 1679 Ballaugh Phillip KILLIP to Pattrick KILLIP
(These are after the 1680 marriage):
19 Feb 1681 Ballaugh Kathrin KILLIP to Patt KILLIP
15 Jun 1682 Ballaugh Jon KILLIP to Patt KILLIP
5 Jun 1687 Ballaugh Patt KILLIP to Patt KILLIP.
21 Jan 1688 Ballaugh Evan KILLIP to Patt KILLIP
Christian KILLIP als LOONEY died soon after in 1690
There is an IGI bapt to Issabell KILLIP 25 May 1695 in Ballaugh to Patrick KILLIP & Mally.

Some early baptisms for a Pattrick KILLIP include:
30 Nov 1627 to Jon KILLIP at Ballaugh.
5 May 1643 to Phillip KILLIP at Ballaugh.
27 Mar 1648 to Jon KILLIP at Ballaugh.

Brian Lawsons' will index has three wills for a Patrick Killip: 1689 in German; 1705 in Ballaugh and 1712 in Ballaugh. I haven't seen any of them.

Perhaps somebody else has more information to add?