I also have the CALLOW Ballaskeig family on my database, but it is based on the Radcliffe book information, and I didn't have an Isabel or wive's names. Thr Radcliffe's are a little enigmatic over this family, if I remember rightly, and i wasn't able to flesh out the family particularly well from other sources....
Family I have are:

Margaret (Snr) m Nicholas KENNISH
Margaret (Jnr)
Mary chr 12 Oct 1710
Edward 25 Feb 1718 - 30 Apr 1797 m Mary CALLOW d/o Christopher CALLOW & Mary SHIMMIN (10 children)
John 18 Sep 1726
+ Isabel 17 Oct 1712

The father William s/o John CALLOW (Balnaskeig Mooar) bur 19 May 1696 & Joney CALLOW (Ballafayle d/o Wm & Ann CHRISTIAN)
siblings Edward 1683 - 1762, John 1685 - 1746, Robert 1687 & Jane 1681

John's father = Wm (Ballaskeig Mooar), bur 26 Aug 1660

Possible Margarets are:

Margaret d/o Wm chr 15 Dec 1706
Margaret d/o Wm & Mally [Kerruish ?] chr 30 Oct 1718
Margaret d/o Wm & Ellin [Christian ?] chr 18 Oct 1718/19
..argarett d/o Wm Apr 1725

Isabels:
Isable d/o Wm chr 17 Oct 1712

Cheers

Clive