Origin
Roh : 1: German: nickname for a crude person from Middle Low German rō ‘raw rough’. This is one of the German surnames that became established in Russia in the 19th century.2: Czech: nickname from roh ‘horn’ applied to a person who looked like a devil (black hair dark skin) or behaved like it. Alternatively a topographic name for someone living in a house on the corner of a street or place based on the same word meaning also ‘corner edge’.3: Czech: from the personal name Roch 1 Latin Rochus.4: Korean: variant of Ro itself a variant of No 1.
Rohan : 1: Irish (Kerry and Cork): from Ó Ruadhacháin or Ó Robhacháin see Rowan.2: Breton and English: habitational name from Rohan in Morbihan Brittany (France).3: Czech: from a derivative of roh ‘horn’ applied as a topographic name or as a nickname meaning ‘the wicked one devil’ (see Roh 2).4: Bangladeshi and Indian: from the predominantly Muslim personal name of Persian origin Rohan ‘swords made of the finest Indian steel’.
Roske : 1: German (Röske) in part of Sorbian origin: see Roeske.2: Germanized form (variant of Roschke) of Sorbian Rošk and Roška: from a pet form of a personal name beginning with Ro- such as Rodoslav (see Rod 3) and Roch 1.3: Germanized form (variant of Roschke) of Sorbian Rožk and Róžk: nickname from diminutives of Lower Sorbian rog Upper Sorbian róh ‘horn’.
Rosko : 1: Hungarian (Roskó): nickname for a red-haired man of Romanian origin (see Rosca).2: Slovak and Rusyn (from Slovakia) (Roško): habitational name from Roškovce in the Zemplín region in eastern Slovakia or a Slavicized form of Hungarian Roskó (see 1 above).3: Slovak and Czech (Roško): perhaps a hypocoristic derivative of roh ‘horn’ or of the personal name Roch 1 Latin Rochus.4: Croatian (Roško): probably from a pet form of the nickname Rošo ‘red-haired’ (see Rosic 2) or its cognate Roso 3. Alternatively of the same origin as the name in 5 below.5: Croatian and Serbian (Roško): from a pet form of personal names beginning with Ro- (see Rodich) or containing the syllable roš such as Juroš (from Croatian Juraj ‘George’). The surname Roško is very rare in Serbia and in Croatia it may alternatively be of Hungarian origin (see 1 above). Compare Roscoe.
Rozek : 1: Polish (Rożek Różek): nickname from rożek diminutive form or róg ‘horn’. This word is found in the idiomatic expression wystawić różki ‘to become impertinent’ which is a likely source of the nickname. The variant Różek occurs almost exclusively in region of Pomerania.2: Czech (Rožek): nickname from the vocabulary word rožek a diminutive of roh ‘horn’. In Czech dialect this word also means ‘croissant’; as such it may be a nickname for a baker or pastry chef.
Ruzek : Czech (Růžek): from růžek ‘little horn’ also ‘croissant’ a diminutive of roh ‘horn cornet’ applied as a topographic or habitational name referring to a house distinguished by the sign of a cornet or as a nickname for a baker or pastry chef.
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Source : DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press
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