House of Holstein-Gottorp-Oldenburg

Coat of Arms
House of Holstein-Gottorp-Oldenburg
Dukes of Oldenburg
Princes of Eutin and Lübeck
House of Holstein-Gottorp-Oldenburg
Grand Dukes of Oldenburg
From 1815
House of Holstein-Gottorp-Oldenburg
Grand Dukes of Oldenburg
Small arms

Cadet Branches
House of Osternburg
Counts of Osternburg
Morganatic branch issued from Nikolaus, eldest son of Peter, Duke of Oldenburg and great grandson of Peter I, Grand Duke of Oldenburg through his 2nd son Konstantin Friedrich
House of Zarnekau
Counts of Zarnekau
Morganatic branch issued from Constantine Petrovich, younger son of Peter, Duke of Oldenburg and great grandson of Peter I, Grand Duke of Oldenburg through his 2nd son Konstantin Friedrich
Russian branch
House of Welsburg
Counts of Welsburg
Morganatic branch issued from Elimar, son of Augustus, Grand Duke of Oldenburg from his 3rd marriage