In the 10th Nabvi year a very dear and near uncle of the Holy Prophet (SAW) died. What was his name?

The Year of Sadness Year of sorrow  (عام الحزن) is the Hijri era when Muhammad’s wife Hadilla and her uncle and guardian Abu Talib died. This year almost coincided with 619 AD, the tenth year since the first revelation of Muhammad.
Explanation:

Hazrat Khadija was the wife of the Holy Prophet (P.B.U.H).

Hazrat Abu Talib was the uncle of the Holy Prophet (p.b.u.h)

Year of sorrow means غم کا سال