Matthews, Mathews, Mathis, Matthew Surnames and Variants

Matthews
English: patronymic from Matthew. In North America, this form has assimilated numerous vernacular derivatives in other languages of Latin Mat(t)hias and Matthaeus.
Irish (Ulster and County Louth): used as an Americanized form of McMahon.

Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4

Mathews
English: patronymic from Mathew; a variant spelling of Matthews. In the U.S., this form has absorbed some European cognates such as German Matthäus.

Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4

Mathis
Dutch and French: from a variant of the personal name Mathias (see Matthew).
English: patronymic from a pet form of Matthew.

Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4

Matthew
English and Scottish: from the Middle English personal name Ma(t)thew, vernacular form of the Greek New Testament name Matthias, Matthaios, which is ultimately from the Hebrew personal name Matityahu ‘gift of God’. This was taken into Latin as Mat(t)hias and Matthaeus respectively, the former being used for the twelfth apostle (who replaced Judas Iscariot) and the latter for the author of the first Gospel. In many European languages this distinction is reflected in different surname forms. The commonest vernacular forms of the personal name, including English Matthew, Old French Matheu, Spanish Mateo, Italian Matteo, Portuguese Mateus, Catalan and Occitan Mateu are generally derived from the form Matthaeus. The American surname Matthew has also absorbed European cognates from other languages, including Greek Mathias and Mattheos. Compare Mathew, Mathai.
It is found as a personal name among Christians in India, and in the U.S. is used as a family name among families from southern India.

Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4