John Kennah and Margaret Fayle or Fell (or even Sayle) had children christened in Douglas between 1806 and 1825. The likely marriage is July 4 1805 John Keaney & Margaret Fayle. Possibly Charlotte was a daughter whose christening was omitted.
Margaret Kennah remarried in 1843 to William Craine and was a widow living in Liverpool with her married son, Joseph Kennah.