The Jennow House is a historic property located at Strandgade 12 in the Christianshavn neighbourhood of Copenhagen, Denmark.

It is believed that brewer Jacob Byssing constructed a building at the site prior to his acquisition of the entire corner lot at No.

[6] Mogens Jensen Nørager, an equipment master (equipagemester), resided in the building with his wife Ane Hedevig Nørager, their three children (aged 13 to 20), two foster children (aged eight and 21), three lodgers, a housekeeper and a maid.

[7] Sophie Charlotte Leth, widow of ship captain Captain Mogens Rabe Rabeholm (1749-1886) and consul Jens Ancker Adrian Leth (1759-17995), resided in the building with her five children (aged eight to 20), her niece Birgitte Cecilie Larsen, one maid and the merchant (grosserer) Hans Georg Christensen.

Emil Z. Svitzer [da] (1805-1886), a timber merchant, resided on the ground floor with his wife Ida Sophie Switzer (née Holstein), their three children (aged two to six), a clerk, a male servant and three maids.

[9] Nicolai Jonathan Meinert, another merchant (grosserer), resided on the first floor with his wife Mette Christine (née Tang), their 10 children (aged seven to 21) and three maids.

Minister of Internal Affairs Peter Georg Bang (1797–1861) lived in the building in 1849.

[13] Johannes Lauritz Hyllerup Geltzer (1799–1878), a major in the Royal Artillery Brigade, resided on the first floor with his wife Louise Henriette Magarethe Geltser (née Hindenburg), their five children (aged four to 12), a niece, his parents-in-law and two maids.

[15] Christine Hansen, a concierge, resided in the side wing with her five children (aged 12 to 26) and three caretakers.

Jacob Frederik Magnusen resided on the ground floor with his wife Charlotte Amalie Magnusen (née Soldenfeldt), a 19-year-old daughter, two maids and the lodger Carl Theobald Worsøe (wine merchant).

[17] Carl Frederik Anton Warhs, a pensioner with title of konferensråd, resided on the second floor with his wife Louise Christiane Warhs, a maid and the Flora Thomsen (lodger).actress [18] The property was owned by a merchant (grosserer) named Jørgensen at the 1880 census.

[20] Johannes Henrik Emil Zøylner (1838-1921), a merchant (grosserer), resided on the second floor with his wife Harriet Clausen, their six children (aged one to eight) and four maids.