if you are suggesting that this Margt was the one bapt 3 Apr 1780 then she + a couple of siblings were bapt in Maughold + later sibs in Ramsey

Land records indicate her parents farmed Kerrowmore in Lezayre which the family had owned from before 1600 so somewhat long established there - as it passed to her it means that there were no male siblings and if there were sisters she was the eldest.