Sabr is a Muslim male name used in
India that derives from the Arabic word for "patience", according to
The Complete Book of Muslim & Parsi Names by Maneka Gandhi & Osair
Husain.
However, as far as I know there is no evidence that the name
Sabrina as used in modern English-speaking countries has any connection with either Sabr or the modern Israeli word and name Sabra. Just because two names resemble one another, that does not mean that they have the same historical origin.