there are two marriages 2 yrs apart in Braddan per IGI (both extracted entries)
John Temble + margt Stephen Bra 18361216
and
Wm Trumble + margt Stewart Bra 18381218

In one Rushen family (where turnbull is not unknown) Thomas Thrumble + margt smith (no marr on island ?) finished up as Thomas Turnbull + margt smith in IGI