Mahjoor
Yes — Ghulam Ahmad Mahjoor was a real and influential Kashmiri poet who used 'Mahjoor' as his pen-name (takhallus).
Linguistically the word appears in Arabic and Persian/Urdu poetic lexicons; its literary use in South Asia is rooted in Persian-Urdu tradition.
No; it is uncommon as a civil given name and is primarily encountered as a poetic pen-name or literary epithet.
It evokes themes of solitude, spiritual estrangement, longing, and poetic seclusion common in Sufi and Urdu poetry.
Given its literary and somber connotations, it may appeal to families valuing poetic heritage; cultural acceptance varies by region.