-taş

Taş ‘stone’ is one of the oldest and plainest words in Turkish. In surnames it usually appears as the second element. Aktaş is the best-known case: by TÜİK ADNKS 2025 it is the 30th most common surname in Türkiye, carried by 222,711 people.

This element is a full word, not a suffix, so vowel harmony does not affect it. Whether the word before it has back or front vowels, the form stays -taş: Karataş, Demirtaş, Göktaş. No linking sound appears between the two parts either.

Structurally these are compounds of an adjective or noun plus taş. The head comes last. Karataş is a kind of stone: ‘black stone’. Aktaş is ‘white stone’, Sarıtaş ‘yellow stone’, Kızıltaş ‘red stone’. The colour word stands first and describes the stone. Demirtaş sets two hard materials side by side: ‘iron and stone’, or ‘stone like iron’. Kocataş means ‘big stone’. Göktaş joins gök ‘sky’ and taş. The dictionary word göktaşı means ‘meteorite’, but the surname stands as a bare compound without the possessive ending. Altıntaş can be analysed as ‘golden stone’ and is also the name of a district. Which reading a record takes depends on its source.

In most of these names stone stands for firmness and endurance. On the site the category follows the head, the stone itself, so they join the mountain, rock and stone surnames. A colour element is marked separately as a secondary category.

The main false friend is the suffix -daş. It means ‘sharing the same thing’, as in arkadaş ‘friend’, yoldaş ‘companion on the road’ and kardaş ‘sibling’. After a voiceless consonant its d hardens and it surfaces as -taş. Yurttaş ‘citizen’ is therefore not yurt + taş but yurt + -daş, ‘one who shares the homeland’. Vatandaş is built with the same suffix. Neither has anything to do with stone.

Bektaş is a separate case. It is known as a personal name, and its etymology is disputed. Splitting it into bek + taş on the strength of its shape would be a mistake. The site treats Bektaş whole, on its own page.

In short, a surname ending in -taş raises one question first: is the ending really ‘stone’, or the suffix -daş? After that, read the first element. Most often it names a colour, a material or a size.