I am advised the connection is BANKS/COWEN Therefore:

Offspring of William BANKS & Alice/Elizabeth COWEN/COWIN =

Ann chr 19 Jun 1791, Douglas, St Mathews, IOM (m John HENDERSON)
Catherine chr 04 Apr 1794 "
Elizabeth chr 21 Jun 1786 " (mother = Elinor COWEN)
Jane chr 11 Jun 1797 " (m William LEWNEY 1828, Braddan, IOM ?)
Robt chr 25 May 1788 "
Sophia chr 04 Jul 1800 "
William chr 24 Aug 1783 " (m Cath QUINE 1813, Braddan, IOM ?)

William BANCKS m Elizabeth COWEN 21 may 1780 Onchan, IOM

William BANCKS possibly s/o Matthias chr 13 Jun 1767, Onchan, IOM (assuming he was christened as a child c.f. infant)