I have:
1. Thomas Costain married to Anne Crebbin Rushen on August 29 1742 buried July 30 1792 aged 78. She died October 20 1782 aged 70. I do not know the parents of Thomas, possibly Thomas Costain & Isabel Brew.
Children of Thomas Costain & Anne Crebbin with christenings dates (all Rushen):
Thomas: Nov 12 1744
Anne: Nov 16 1744 (buried Nov 17 1744)
Richard: Sept 29 1745
Christian: March 6 1747
Isabel: June 24 1750 married James Christian Nov 14 1779, buried Feb 11 1830
John: Feb 10 1754
Ann: August 13 1758
2. Thomas Costain & Isabel Brew
John: May 9, 1715 - possibly the spouse of Alice Gawne m. 1734
William: Oct 1718 buried Nov 19 1725 (small pox)
Ann: Oct 22 1721 buried Nov 18 1725 (small pox)
Jony: March 15, 1727 - possibly married John Keig June 21 1857
3. Ann Costain married John Corrin Jan 24 1739, died June 16 1776 aged 58. He died Dec 15 1747 aged 32 years, leaving a will that has not yet been transcribed.
There are about 150 Costains in the burial register of Rushen and probably a similar number in Arbory.
Bruce Ingram