Career
He competed at the 1908 Summer Olympics and the 1920 Summer Olympics. Cornelis van Altenburg was married with Anna Maria Frederica Balck (1900 Rotterdam), daughter from Johann August Balck, owner of an old Rhineship company (JA Balck) in Rotterdam - still working. Cornelis van Altenburg had a captain diploma for navigation on the Rhine and was a skipper (on a ship from JA Balck) mainly on the route Duisburg-Rotterdam.
He lived mostly with his family on a ship and in Rotterdam.