All around the world, Fredericus (Fredericus 
) is a rare masculine given name. The first name Fredericus is habitual in Netherlands, where it is a rare male name, Belgium, and Indonesia, where it is a very rare masculine name. Much less frequently, Fredericus is the last name as well as the forename.
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| Fredericus | Netherlands, South Africa, Romania, Spain, Indonesia |
| fredericus de senis author (1301-1500) (b. 1301) |
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| fredericus abbema Belgian minister (b. 1601) |
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fredericus nijsingh politician (1731-1811) (b. 1731) |
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| fredericus saxe (b. 1759) |
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| fredericus theodorus renard Dutch painter, NL (b. 1778) |
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| fredericus van leyden van westbarendregt (b. 1768) |
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fredericus anna jentink Dutch zoologist, NL (b. 1844) |
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fredericus van rossum du chattel Dutch painter (1856-1917), NL (b. 1856) |
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| fredericus anthonius jacobus hoffmann (b. 1800) |
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| fredericus maria clemens odolphus huibertus appolinaris paulinus de weichs de wenne Dutch nobleman and military officer, NL (b. 1818) |
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| fredericus wilhelmus tschierschke (b. 1838) |
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fredericus soetrisno harjadi Indonesian politician, ID (b. 1899) |
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fredericus henricus maria van straelen NL (b. 1899) |
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| fredericus cornelius van beukering birthdate: 1869 deathdate: 1938 viaf: 216483648 alias: Beukering, Fredericus C. van; Beukering, F. C. van (b. 1869) |
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| fredericus aurelius reinoldus padberg priest, NL (b. 1876) |
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Rex, Santoso, Setyono, Smeijers, Adyartha, Coleman, Bambang, Brooymans, Bierens, Pambudi, Raaffels, Gunawan, Janssen, Martinus, Maatjens, Boogaard, Bimantoro, Huijskens, Wibisono, Claessens, Klinkhamer, Prihartadi, Vosman, Huting, Heezen, Daniel, Mica, Beek, Peet, Deen, Jong, Hari, Silva, Stein, Smith, Arsel, Vanderpeet, Aslim, Kevan, Peijs, Putra, Gales, Weber, Meijer, Mulder, Arthur, Booker, Derijk, Colen, and Widaryanto