Last name Oldenburg (Oldenburg 
, Ольденбург 
, Олденбург ) , globally, is a common family name. The family name Oldenburg is characteristic of Germany, where it is quite a rare surname, Denmark, and Netherlands. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Netherlands.
| VARIANT | COUNTRY |
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| Oldenburg | Germany, Sweden, Netherlands, Brazil, United States |
| Ольденбург | Ukraine, Russia, Kyrgyzstan, Kazakhstan |
| Олденбург | Ukraine, Russia |
Oldemburgo, Oldenberg, Oldenborg, and Данська
| gerold von oldenburg DE (b. 1100) |
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| christian i. von oldenburg DE (b. 1123) |
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| egilmaar von oldenburg (b. 1150) |
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| otto i of oldenburg Roman Catholic bishop, IL (b. 1200) |
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| christian von oldenburg Peerage person ID=8398, DE (b. 1200) |
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| otto of oldenburg Abbot in Bremen and of Rastede (b. 1250) |
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dietrich von oldenburg German noble, DE (b. 1390) |
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| moritz iii. von oldenburg Peerage person ID=8317, DE (b. 1350) |
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| ingeburg von oldenburg (b. 1350) |
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| adelheid von oldenburg Peerage person ID=8291 (b. 1425) |
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| moritz iii. von oldenburg German canon, DE (b. 1428) |
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| gerhard oldenburg Peerage person ID=6385 (b. 1454) |
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christoph von oldenburg Count of Oldenburg, DE (b. 1504) |
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| anna oldenburg Peerage person ID=6391 (b. 1469) |
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dorothea af oldenburg Electress Palatine (1520-1580), DK (b. 1520) |
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