23 Sept 1877, a Margaret Hudson (father John Hudson) married William Boyde in Rushen.
In 1881 they were living in Port Erin with 2 small children and Margaret’s age was 26. I’m guessing that this could be the 17 yr old Margaret Hudgeon you found in Thomas and Jane Sansbury’s 1871 household. This Margaret was probably the daughter of John Hudgeon and Jane Kelly, bap 15 jan 1854 Rushen.
Jean C