Yadigar
No. Yadigar is of Persian origin (یادگار) and became used in Ottoman Turkish and other Persianate Muslim contexts; it is not originally Arabic.
Yes. The word and name are attested in Persian literature and Ottoman administrative and onomastic records; it persists rarely in modern registries.
Culturally, Yadigar conveys remembrance, legacy, and affection—like a cherished keepsake or token kept to remember someone or something.
Yes. It appears among Turkish, Azerbaijani, and South Asian Muslim communities influenced by Persianate naming traditions.
It is written as یادگار in Persian and Urdu scripts and pronounced yādgār in Persian.