Averil, there is absolutely no evidence that Daniel Looney b.1745 and his brother John, sons of John Looney & Margaret Kelvie, were twins, as you have written several times and again now.
Logically, it seems highly unlikely that parents would have one twin baptised and not the other one.

You (or CR - did she write this, as you have inferred?) may have been confused by the other Looney twins who WERE baptised together.

You wrote:
"Which fits in nicely with Constance Radcliffe - Looney - Tree Bwoaillee Losht (2).
John (1745-1804 E 2nd 1805) Bwoaill’trooan, Dreemskerry (Spout House) m Margaret Hutchin (d 1802 E 2nd 1803).

Born the same year as….. Daniel 1745 & John Looney 1745 ….the twin sons of John Looney & Margaret Kelvy."

What are the two John Looney 1745 dates of birth based on?

These are the only Looney male baptisms found in the Maughold Parish Register between 1740 & 1750:

Daniel son of John Loony/Margaret 4 Aug 1745

Daniel son of William Looney/ 8 Aug 1747
Private baptism. Twin of William
William s/o William Looney/ 8 Aug 1747
Private baptism. Twin of Daniel

Thomas s/o John Looney/ 14 Aug 1748

John s/o Robert Looney/Jane Kneen 23 Jun 1750
Private baptism

Robert s/o William Looney/ 23 Dec 1750

Sue