Chrissey,
In all of Ireland there was just one Crombie shown in the Griffith's Valuation 1848 - 1864 and that was Esther Crombie, Co. Westmeath, Civil Parish Ralugh, Townland of Montrath.
There was also just one Crumb at the same time, and that was James Crumb, Co. Westmeath, Civil Parish Rathconnell, Townland of Macetown.
John...Sydney