Leatrice seems to be a combination of two names, Leah (a Hebrew female name possibly meaning “weary, languid, tired” though it’s also been associated with the meaning of “cow”. It might also be related to an Akkadian word meaning “mistress”); and Beatrice, the Italian form of Beatrix which means ‘”happy” or “blessed” from Latin beatus, taking on the meaning of “she who makes happy” or it could be a variant form of Viatrix, also from Latin meaning “female traveler/voyager”. It’s just as likely that Leatrice is a variant spelling of Liatris, the name of a genus of flowers also known as blazing star and gayfeather, native to North America (including Mexico and the Bahamas). I couldn’t find anything behind the name.
Origin: Hebrew, Akkadian, Latin