North German and Dutch: from a short form of Thomas.
Compare Maas 1 and Mass.Catalan and southern
French (Occitan): topographic name for someone who lived in an
isolated dwelling in the country, rather than in a village, from
Catalan and Occitan mas ‘farmstead’ (Late Latin mansum,
mansus).
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
55,599
Historical Documents & Family Trees with Mas
The information for this chart came from the U.S. Immigration Collection at Ancestry.co.uk.
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