Вот про имя с tolkiengateway.net:
The name Berúthiel is Sindarin. It seems to mean "Angry Queen", incorporating ber(eth), 'queen, spouse'; rúth, which means 'anger'; and the feminine suffix -iel. Since the Black Númenóreans did not use the Elven tongues, this title was probably given to her by the Gondorians and is not her real name.