The Romanian never required Jews by law to adopt family names. The text of Romanian civil laws regarding registration assumed that all had family names. There was never a law that said that all have to have surnames.
In 1895 there was a law that required anyone who used in daily life a name or surname different than that registered in the records to register the name/surname change. That was the only requirement - but most Jews did not bother. In fact, in 1949 the communist authorities repeated this requirement in a decree.
