Prince Waldemar William Louis Frederick Victor of Prussia was the eldest son of Prince Henry of Prussia and Princess Irene of Hesse and by Rhine. He was known as Toddy to his friends and family.
Waldemar in 1915
Prince Waldemar with his parents and younger brother, Sigismund
Prince Friedrich of Hesse and by Rhine was a son of Louis IV, Grand Duke of Hesse, and Princess Alice of the United Kingdom, and was the grandson of Queen Victoria. He was the maternal great-uncle of
Prince Friedrich, April 1873.
