I don't disagree with the fact that a Looney married a Looney, but... when I look at the data on the Manx Notebook and on the Family Search website, they both show that it was a Margaret Looney who married William Looney. Not William Looney married, Margery Looney 6th May 1732 as is shown in your data and trees.

Neither data source has an actual image that can be checked to see which is correct.