Nigel, I have a Qualtrough connection with Corjeage, KK Michael in the 1770s and beyond...

Esther Qualtrough married Charles Corjeage 29 April 1783 in Rushen. Charles was bn c1759 KK Michael and he and Esther had 3 chn:

Hugh bn & died 1783 KK Michael
Margaret bn 1785 KK MIchael died Jurby 1865 apparently unmarried
Charles bn 1787 KK Michael I have no other info on Charles.

I am not aware if there was any property ownership in this branch of the Corjeage family.

Any assistance welcome.