Surname Law

The Surname Law (Soyadı Kanunu) of the Republic of Turkey, adopted on 21 June 1934, required all citizens to take fixed, hereditary surnames and took effect on 1 January 1935 with a two-year compliance period. Introduced as part of Atatürk’s modernization and secularization program, the law mandated that surnames follow given names in all use, prohibited names tied to military or civil ranks, tribes, foreign ethnicities, offensive terms or unproven "historical" claims, and gave household heads - usually men - the primary right to choose family names. Specific non‑Turkish suffixes were banned (for example ‑ian/‑yan, ‑ov/‑of, ‑pulos, ‑zade, Semitic patronymics), while Turkish formations such as ‑oğlu were allowed. Two accompanying measures abolished Ottoman honorifics (efendi, bey, paşa) and reserved the surname Atatürk for Mustafa Kemal alone.

Implementation varied widely: urban, educated populations adapted quickly while rural communities often resisted or used dual local and official names; registries recorded competing claims and lists of proposed names, and public announcements in newspapers were used to secure desirable surnames. Officials and elites competed for names, and some perpetrators of wartime crimes changed names to conceal identities. The law is credited with imposing linguistic uniformity and criticized for advancing Turkification and erasing minority identities; although some descendants of forcibly assimilated groups have sought reversals, Turkish law remains restrictive about surname changes.