1. English (of Norman origin): from a personal name, Aquart, Old French Achart, a derivative of a Germanic personal name composed of the elements agi(n) ‘edge (of a sword)’ + hard ‘bold’, ‘hardy’. Compare German Eckhardt and Italian Accardo, which are from the same source.
2. German: from a Germanic personal name (as in 1).
3. German: Americanized spelling of Eckert.
See the Key to the Dictionary or consult the General Introduction for further explanation.