Theodor Johan Christian Ambders Brorsen was born in Nordborg on the island Als, (South Jutland), as son of the captain Christian August Brorsen (1793-1840) and Annette Margrethe Gerhardine Schumacher (1788-1855).
Den Theodor Brorsen gouf zu Nordborg op der Insel Alsen (Nordschleswig) als Jong vum Kapitän Christian August Brorsen (1793–1840) a senger Fra Annette Margrethe Gerhardine Schumacher (1788–1855) gebuer.