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First name origin & meaning:

Old German: Vigorous

First name variations: Earnest, Ernie, Ernestino, Ernesto, Ernestus, Ernest

Last name origins & meanings:

1. German and Dutch: from the personal name Ernst, which is most probably a byname from Middle High German and Middle Dutch ern(e)st ‘combat’, ‘serious business’. However, see Ernest.
2. Jewish (Ashkenazic): nickname or ornamental from German ernst ‘earnest’, ‘serious’.