Ethar
Yes. Ethar is derived directly from the classical Arabic noun إيثار (iṯār), a real lexical item meaning selflessness; it is used as a given name in Arabic-influenced and Urdu-speaking communities.
In Urdu Ethar is written ایثار and conveys 'selflessness' or 'altruism'. In Arabic it is إيثار with the same ethical meaning.
The term iṯār (إيثار) appears in Arabic lexica and in Islamic ethical discussions. While not a name of a well-known historical figure, the concept is discussed in religious literature.
Yes. Ethar is a virtue name with a morally positive meaning and is acceptable for Muslim girls, especially in Urdu-speaking or Arabic-influenced contexts.
Ethar is relatively rare compared with more common virtue names; its popularity score here reflects low contemporary use while retaining clear linguistic authenticity.