Heraldry and the Keddy Surname
Heraldry follows families, not surnames. A Keddy coat of arms, where one exists, belonged to a specific line.
Family name meaning
Keddy began as a Scottish family name. In Elsdon Smith's reading, the name described “the son of Adie, a pet form of Adam (red earth). j”.
It is a patronymic: it named a person after a father or forebear. Smith also lists Keddie and Keady. 532 Americans were listed as Keddy in the 2010 census. That is enough to place it in the top 50,000 American surnames.
Want more than a summary? See the Keddy family name pack.