As far as I know it's not frowned upon. Tibetans have names that, in general, are holy names, or the meaning is something holy. For example, Ngawang is another name for Manjushri, suposedly the bodhisattva of wisdom.
But if you want a confirmation, contact www.dharmawheel.net
, the sister site of this forum, that focuses on other traditions than Theravada, namely, Tibetan buddhism.
He turns his mind away from those phenomena, and having done so, inclines his mind to the property of deathlessness: 'This is peace, this is exquisite — the resolution of all fabrications; the relinquishment of all acquisitions; the ending of craving; dispassion; cessation; Unbinding.'
(Jhana Sutta - Thanissaro Bhikkhu translation)