Johan Valckenaer died in 1821.
Johan Valckenaer was born in 1759.
Lodewijk Caspar Valckenaer died in 1785.
Lodewijk Caspar Valckenaer was born in 1715.
Johan Arndt died in 1933.
Johan Olin died in 1928.
Johan Quanjer died in 2001.
Johan Bryde died in 1925.
Johan Kemp died in 1941.
Johan Gørbitz died in 1853.
Johan Bara died in 1634.
Johan Amberg died in 1914.
Johan Martens died in 1932.