Question regarding Golde Lea (Leni) Lobel

According to the Yad Vashem Righteous Among Nations Archives, Johannes van den Berg and his wife saved many Jews in their house including Jack and Stella Beder (also related to me) and Leni Lobel and Gitta Grinberg. My question is who is Gitta Grinberg? We know that Leni Lobel's husband was taken. We also know that she survived with a son (likely named Simkha). Could you check your archives for more information? Also about the son of Izrael Chaim Lobel and Leni (Golde Lea) Beder? He did survive the war. Many thanks.