Arthur Dannenbaum belonged to the students of Bad Kissingen Realschule who came from the region of Rhön-Grabfeld and spent some years in Bad Kissingen during their time at school. He was born in Mellrichstadt on October 25, 1885 as the son of the cattle and horse dealer Levi Dannenbaum from Reyersbach and his wife Sabine, née Schwab among lots of siblings. All in all, Arthur had nine brothers and sisters, three of whom, however, died in their early childhood. His father was also head of the jewish community in the 1880s.

After elementary school he obviously went to a school in Würzburg and in September 1899 entered class 4 of Bad Kissingen Realschule. In July 1902, he got his diploma of secondary education there. During those three years, he lived with Abraham Salzer in Weidgasse 7. His brother Max who was three years his junior lived there, too. Between 1899 and July 1904, he also attended Kissingen Realschule, the predecessor of contemporary Jack-Steinberger-Gymnasium. There is no further information on his life to be obtained at the moment.