nameLab: find a name, make a name, change a name

Last name origins & meanings:

1. Polish and Jewish (from Poland): from Polish kaczor ‘drake’, applied either as a nickname or (especially among Jews) as an ornamental name.
2. Hungarian: nickname from Slovak kocúr ‘tom cat’; alternatively it may be from Hungarian kacor ‘curved knife’ (from Southern Slav koser, kosir, kosor), perhaps as a metonymic occupational name for a maker or user of such knives.