Menachem eventually reunited with some of his biological family, but has never stopped wanting to find his brother.
"I asked him, 'What are your expectations?' and he told me that he's trying to be practical and keep it very low," KimRon said. "He would be happy with Jolli's grandchildren."
"He may be concerned," she said. "The higher the expectation, the bigger the disappointment."
After months of research and dead ends, KimRon turned to Facebook for the world's help.
She posted a black and white photo of 5-year-old Menachem after the war and a photo of him now. The photo of him as a child has been shared more than 50,000 times and the Facebook page has more than 12,000 supporters from around the world.
KimRon said they have both been surprised and "overwhelmed" by the outpouring of support from around the world.
"In general, he feels lucky with the support and prayers and hope from all over the world," KimRon said. "I'm updating him at least once a day, if not twice."
KimRon said that the draw to Menachem and his story is stronger than just wanting to solve a mystery. She hopes helping him find his brother could "help him have a different state of mind and more emotional freedom in his life."
"It's a tough mission, but we'll get there," she said confidently.
"I gave him a promise," KimRon said. "I'm going to find his brother dead or alive, even if it takes me my whole life. I'm not going to stop."
Anyone with information about Jeno is asked to email FamilyRoots2000@gmail.com.