does Thomas son of Thomas Kewley & Isabella Corran (varies from Corrin to Carran in bapts) baptised at Douglas St George 1814-01-29 fit ? - one possible problem is that there were two children baptised same day (?twins or a late bapt) and what looks like the next child is baptised within a short time (married Braddan 1808-04-26)

there is another thomas s/o John kewley + margt callow bapt Douglas St Matthews 1815-01-01 but there would appear to be no other children of this couple and no obvious marriage

Borrowing the film of the parish reg may well allow you to check