Family name affixes are a clue for surname etymology and can sometimes determine the ethnic origin of a person. This is a partial list of affixes.
Prefixes
Arabic Abu – (Arabic) "father of"; Al – (Arabic) "Family of" or "House of" (in conjunction with name of ancestor) Bet – (Arabic from "Beyt") "house of" Bint – (Arabic) "daughter of"; Binti, Binte (Malaysian version) El – (Arabic see Al) Ibn – (Arabic) "son of"
Armenian Ter – (Eastern Armenian) "son/daughter of a Priest" Der – (Western Armenian) "son/daughter of a priest"; (German) "the" (masculine nominative), "of the" (feminine genitive)
Berber Ayt/At/Ag/Id u- – (Berber) "of" At/n Ath – (Berber) "(son[s]) of" U - (Berber) "son of"/"descendent of" Ult - (Berber) "daughter of"
Dutch de – (Dutch) "the" 's – (Dutch) "of the"; contraction of des, genitive case of the definite article de. Example: 's Gravesande. 't – (Dutch) "the"; contraction of the neuter definite article het. ter – (Dutch) "at the" van – (Dutch) "of", "from" van de, van den, van der, van 't – (Dutch) "of the", "from the"
French "of", "of the", "from"; often a sign of nobility or old bourgeois family, but also just a geographical term of the name originated of a location :
d' de de La des du
German von – (German) "of", "from"; often a sign of nobility, but also just a geographical term if the name originated from a location. zu - (German) "at"; a sign of nobility, sometimes in the combination von und zu, meaning the noble family still owns the place of naming
Hebrew Bath, bat – (Hebrew) "daughter of" Ben, bin, ibn – (Arabic and Hebrew) "son of"
Irish Mac, Mag – (Irish) "son of". Mac is sometimes written Mac (with superscript ac). Nic , Nig – (Irish) "daughter of", from Irish "iníon" meaning "daughter" Ó, Ua – (Irish) "grandson of", (male) "descendant of" Ní – (Irish) "granddaughter of", (female) "descendant of" Uí – (Irish) "descendants of", "wife of a descendant of". de – (Irish) "of". Irish names with this prefix are usually of Norman origin.
Italian Del – (Italian, Spanish) "of the", preceding a masculine singular noun Degli – (Italian) "of the", preceding a masculine plural noun starting with either sp, sc, ps, z, gn, or st. Della – (Italian) "of the", preceding a feminine singular noun Di, De – (Italian) "of"
Romanian A – (Romanian) "son of"
Welsh Ab – (Welsh, Cornish, Breton) "son of" Ap – (Welsh) "son of" Ferch, Verch – (Welsh) "daughter of" Verch, Erch – (Welsh) "daughter of"
Other Af – (Danish, Swedish), Av (Norwegian) "of" Ālam/Olam – Persian — "world" Bar – (Aramaic) "son of" Chaudhary - (Punjabi) A title of honour from the Punjab used by several Punjabi tribes, often represented by the prefix "Ch". Da – (Italian) "from", "of"; (Portuguese) "from the" (before a feminine singular noun) Das – (Portuguese) "from the", "of the", preceding a feminine plural noun De – (Italian, French, Spanish, Portuguese, Filipino) "of"; indicates region of origin, often a sign of nobility; in Spanish-speaking countries a married woman will sometimes append her name with "de XXXX" where "XXXX" is her husband's last name; (Dutch) "the" Dele – Southern French, Filipino, and Occitan, equivalent of Du Dos – (Portuguese) "from the, of the", preceding a masculine plural noun Du – (French) "of the", preceding a masculine singular noun E – (Portuguese) "and", between surnames (Maria Eduarda de Canto e Mello) Fitz – (Irish, from Norman French) "son of", from Latin "filius" meaning "son" (mistakenly thought to mean illegitimate son, because of its use for certain illegitimate sons of English kings) i – (Catalan) "and", always in lowercase, used to identify both surnames (e.g. Antoni Gaudí i Cornet) ka – (Zulu) "(son/daughter) of", always in lower case and preceding the name of the father. Kil, Gil, Mal, Mul – (English, Irish, Scottish) "son of", "servant of", "devotee of", originating from the Irish "Mac Giolla", typically followed by a Saint's name (e.g. Mac Giolla Bhríde). La – (Italian, French, Spanish) "the", feminine singular Le – (Northern French) "the", masculine singular M'/Mac/Mc/Mck/Mhic/Mic – (Irish, Scottish, and Manx Gaelic) "son". Both Mac and Mc are sometimes written Mac and Mc (with superscript ac or c). In some names, Mc is pronounced Mac. Mala – (Kurdish) "House of" Na – ณ (Thai) "at" Ngā – (Te Reo Māori) "the (plural)" Nic, Ní – (Irish, Scottish) "daughter of", from Irish "iníon" meaning "daughter" Nin – (Serbian) O/Ó/Ua/Uí – (Irish, Scottish, and Manx Gaelic) "son of", "grandson of", "descendant of" Öz – (Turkish) "pure" Pour – (Persian) "son of" Te – (Te Reo Māori) "the (singular)" Tre – (Cornish) "settlement/ homestead farm of"
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