you stated she was born in Onchan - in 1861 states born Douglas + living in Tromode which is in Braddan (tho near boundary with Onchan) with paternal family also living in Tromode - not sure where Onchan comes into it
Hugh(or Ewan) the gfa is possibly illeg c/o Wm Cain + Dorothy Lace als Kneen bapt Ramsey 17980128 - Dorothy Lace presented by both Maughold and Ramsey wardens at chapter court 28 Jun 1798 tho father not named in Presentment