Anna Auguste Friederike (Anna) Sethe (1835–1862)
Anna Auguste Friederike (Anna) Haeckel (1862–1864)

Daughter of Christian Carl Theodor Ludwig Sethe. Cousin of Ernst Haeckel, whom she married in Berlin in 1862.

Sources

DSB s.v. Haeckel, Ernst

Germany, Lutheran baptisms, marriages, and burials, 1500–1971 (Ancestry.com, accessed 9 September 2022)

Uschmann 1984, p. 317