in 1851 census she give birth parish as Lezayre and aged 25 - Euan Gill + Jane Taylor had a first child Jane anne bapt Lezayre 18240819 - they married at Andreas - have you checked the actual register as I presume you got father's name John from the marriage but could this have been a misread or a misheard Euan ?
In 1841 she would appear to be with widowed ? father Ewan (+ his mother ?)+ his bro robt at Barony farm