The mass kidnappings by the Islamic State (IS) jihadist group targeted those who either refused or simply could not flee a string of villages around Mount Sinjar, one of the minority's main ancestral homes in northern Iraq.
The refugees say the women and children are being held in IS-controlled prisons in Nineveh province, where a sweeping jihadist-led offensive was launched in June, and that many of the men are feared to have been executed.
His voice shook as he told AFP: "Please write down their names. My son, 26-year-old Haidar, is among the missing."
Other Yazidis, just as distraught, gave similar accounts.
More From This Section
"My two cousins and my two uncles were kidnapped," said Jacqueline Ali, a 17-year-old high school student now sheltered at the Bajid Kandala camp near the Tigris River, in the autonomous Kurdish region of northern Iraq.
Cradling her sister's infant, she spoke quietly as her large brown eyes welled up with tears.
Amnesty International, which has been documenting the mass abductions, says thousands of Yazidis have been kidnapped by IS since an August 3 onslaught on their villages began.
The attack pushed the Yazidis out of their villages near the Iraq-Syria border. Survivors fled onto Mount Sinjar, where they were besieged by IS for days with little food or water.
Some 200,000 people escaped to safety in Iraq's Kurdish region, but others remain on the mountain, and Amnesty International's Senior Crisis Response Adviser Donatella Rovera said the fate of "thousands" of abductees remains uncertain.
She also said the kidnappings all appear to have happened in villages where residents dared to take up arms against the jihadists.
While IS has a track record of kidnapping in Syria, the group has not previously rounded up women and children en masse.
"It seems they took away entire families, all those who did not manage to flee," Rovera said.