Вот тут, правда на английском, есть исследование http://historymedren.about.com/od/abbey/a/11_ab_athos_2.htmВот цитатата оттуда:However, there is an actual person canonized as St. Laura. She was a married woman whose husband later died. Sometime after his death she joined a convent in Spain, became abbess, and while abbess was thrown into a vat of boiling tar by the Moors for her refusal to deny Christ and convert to Islam. She died in A.D. 864 and her feast day is celebrated on October 19th. Though usually considered a Roman Catholic saint due to her Western origins, she is also recognized by the Orthodox Christians since she is "pre-schism", that is, before the Roman Catholics split from the Orthodox in A.D. 1054.Еще можете если хотите в википедии глянуть инфу http://ru.wikipedia.org/wiki/%D0%9A%D0%BE%D1%80%D0%B4%D0%BE%D0%B2%D1%81%D0%BA%D0%B8%D0%B5_%D0%BC%D1%83%D1%87%D0%B5%D0%BD%D0%B8%D0%BA%D0%B8 , ну или у батюшки спросить Наш батюшка сказал, что в русском произношении это имя раньше звучало Лавра.