Cyrus G. Rensselaer

Cyrus G. Rensselaer was an American businessman with connections in England and continental Europe. He and his wife, Mary, had two children, Veronica Winter and Glenn Rensselaer. Cyrus was not pleased about his daughter's marriage to Harald Winter and, over the years, tried to convince her to return to the United States. The Rensselaers visited Veronica and their grandsons in Germany. Cyrus had a guarded relationship with Harald.

Appearance
Cyrus and Mary visited Veronica and her family in Germany in the summer of 1906. They discussed the hunting lodge that Harald had given Pauli as a christening present.

In 1916, Cyrus visited London while Glenn Rensselaer was working as an instructor pilot with the Royal Flying Corps. They discussed the difficulty of flying against zeppelins at night. Cyrus told Glenn he was planning on marrying Dot Turner, a widow with three sons; Cyrus assured Glenn that the Turner boys would not take the Rensselaer and that the marriage would not matter to Glenn or his sister Veronica.