Peter  S i e m s e n, b. 6.10.1787 in Hamburg, d. 29.10.1854 ibid., son of the business man Lüppe Siemsen and Margaretha Keetmann. Business man in Hamburg. Since 1833, Senator in Hamburg, the first Calvinist Hamburg senator. Married 1815 with Amalia Beckmann, daughter of the dome's secretary.

[...] ''On 16.03.1848, my father married the oldest still living daughter of the Hamburg senator Peter Siemsen and his wife Catharina Amalia Beckmann. She, too, only used the one name, Amalia. Also from the childhood of my mother I know very litte. She was born on 13.07.1822 in her father's house in the Pastorengasse. Two older siblings, a sister also called Amalie, a brother called Peter, were already dead by that time.''
[...] ''My grandfather bought 1834 the house at Esplanade 10 which, albeit much changed, did still stand during my last visit in 1914. He, together with his brother, my grand uncle Jan, comprised until his early death in 1854 the firm Peter Siemsen and Co, which my uncle Nölting with my uncle Peter also joined.'' [...] ''My grandfather was, as already remarked, senator Hamburgiensis. My father maintained that Peter Siemsen became a senator by accident. It was his younger brother Jan, a bachelor of clear mind and solid knowledge, whom they had voted in. But, by accident, the mayor drove up to my grandfather's house, and one then nolens volens left it that way. Whether there is any truth to this, I don't know, but, in any case, Jan is said to have been the far more clever one of the two.''

Albert de Boor (1852-1945)

Erinnerungen aus der Jugendzeit von Albert de Boor

Gesichter und Persönlichkeiten (Faces and Personages), Gisela Jaacks