Carole, In searching for Cadwaladers, you might try that spelling. The spelling you used, Cadawalder, is unusual. I count some Cadwaladers among my friends and they always spell it Cadwalader, which is also how it's spelled in place names and elsewhere hereabouts in the Philadelphia area. But I wouldn't be surprised to see it spelled in a variety of other ways too. Kelvin Kean Elverson, Pennsylvania