So is the ethnonym Bulgar(ian) (<blUgarU>).
>
> Piotr
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According to Petar Skok, ethnonym Bulgar(ian) is derived from
Turkish verb bulgamak 'to mix', believing that Bulgarians are mixed
tataro-turkic nation, so <bulgar> means in Old Turkish 'mixed'. This
explanation was accepted even from Mladenov (ERHSJ, JAZU, Zagreb,
1971, pp. 228).
Konushevci