Hello Greg, if you have a look at,

http://www.isle-of-man.com/manxnotebook/famhist/wills/1770_jl.htm

this is the Will of John Looney Senior of Crow Creen,

click on, Margaret Looney, and it has Her Will scroll down to the bottom of the page,

there is the Kelvie / Kelvin family tree,
Averil