In which reign the queen ruled Sweden under whom Henning Podebusk served? 
Henning Podebusk:  He served under King Valdemar IV, King Oluf II, and Queen Margaret I, and he was the "de facto" ruler of Denmark from 1368 to 1370. Margaret I of Denmark: Margaret I (Danish: "Margrete Valdemarsdatter" , Norwegian: "Margrete Valdemarsdatter" , Swedish: "Margareta Valdemarsdotter" , Icelandic: "Margrét Valdimarsdóttir" ; 1353 – 28 October 1412), was queen consort of Norway 1363-1380 and Sweden 1363-1364, and later ruler in her own right of Denmark, Norway and Sweden, from which later period there are ambiguities regarding her specific titles.
i don't know