Sarah Yanai, an 86-year-old Holocaust survivor, clutched the handle of her wheelchair as she closed her eyes, and then opened her arms to embrace the woman who helped save her and most of her family from the Nazis more than 75 years ago.

“How are you, how are you Melpo?” Ms. Yanai asked in Greek while stroking the cheek and silver hair of Melpomeni Dina, the 92-year-old Greek woman who, along with her two sisters, provided a hiding place for Ms. Yanai’s family in Veroia, a town in northern Greece, during the German occupation of the country in World War II.

The two women and Yossi Mor, Ms. Yanai’s brother, were reunited at Yad Vashem, Israel’s Holocaust memorial center, in Jerusalem on Sunday.

The meeting, which was set up by the center and by the Jewish Foundation for the Righteous, a charity that assists those who risked their lives to save Jews, might be the last of its kind, Stanlee J. Stahl, the executive vice president of the foundation, said by phone on Tuesday.