Johan Andreas Altenburg no. 3 from right, with wife Hedevig, daughter Marichen Altenburg and other relatives, late 1810s
Johan Andreas Altenburg (1763–1824) was a Norwegian merchant and shipowner, who belonged to the patriciate of the port town of Skien. He was originally a ship's captain, but stopped sailing at a relatively young age. He was the father of Marichen Altenburg and thus the maternal grandfather of playwright Henrik Ibsen. Following his death and his daughter's marriage to Knud Ibsen in 1825, his considerable fortune passed to his son-in-law, who however went almost bankrupt due to failed speculations in the mid-1830s. Johan Andreas Altenburg owned the stately Altenburg Manor in central Skien, where the Ibsen family lived until Knud Ibsen's bankruptcy, as well as several ships, a farm and Bratsberg county's second largest brewery. The Altenburg Manor burned to the ground in the 1886 fire in Skien.
Johan Andreas Altenburg was born at Lille Ulefos, the son of sawmill manager Diderik Altenburg (1719–1766) and Marichen Johansdatter Barth (1737–1769). His parents died early. He married Hedevig Paus, a sister of shipowner Ole Paus and Martha Paus (married Blom). His sister, Kristine Cathrine Ploug, lived with him and his family following the death of her husband in 1799.