Also Romansh. Source: "Vornamen in der Schweiz. Prénoms en Suisse. I nomi in Svizzera. Prenoms in Svizra" (1993) published by the Association of Swiss registrars Https://rm.wikipedia.org/wiki/Cara_Laura Https://nossaistorgia.ch/entries/36oVjk0ADPy Https://www.portraitarchiv.ch/portrait?page=85 Http://www.annalas.ch/persunas/display/q:Laura
In 2018, 46 is the most common age for an American (U.S.) Laura who is registered female with the Social Security Administration. It is the 67th most common female first name for living U.S. citizens.
― Anonymous User 10/5/2018
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Laura is a common Lithuanian name as well. I do know that as a fact, however, that's as far as my knowledge goes. I would suspect it came from Rome when Balts traded amber for things Romans would offer, but I could not find any source confirming it so it is only my guess. If it was't from Romans, then it had to be from Poland either after Christianity was introduced, or after Polish-Lithuanian Commonwealth was created.
Laura is also used in Poland. It wasn't very popular for ages, but started to gain some popularity in 80s' and now is overwhelmingly popular. To show you how popular it is I can tell you I have two little cousins with this name. I think some time ago it was generally considered quite mysterious. Nameday is 17 June. Some more common diminutives include Laurka, Lara or Lusia.
Scripts: Лора (Russian)
Sources: https://en.m.wikipedia.org/wiki/Laura_(given_name) (Variants Section)
https://forebears.io/forenames/laura