I do not know the name of the first wife, or the daughters of Miksa. His second wife was Pepi.
They lived abroad, and the girls came to the US in the 1930s. I am guessing they still lived in Hungary/Romania then, because Miksa was in a labor battalion in 1942, and must have gotten to Israel with his second wife and the children later.
It is possible that the children went to live with other relatives of their mother.
I still have an elderly relative, a nephew of my grandfather and Miksa, that is a holocaust survivor living in Brooklyn. He would dearly love to find out about these women or their families. I have been searching for years, and this relative is very unwell, and not as mentally functioning as in years past.