The Bulgars were a Turkic‑speaking, semi‑nomadic confederation from Central Asia.
The Turkic Bulgar elite gradually assimilated with the Slavic majority (South Slavs) who had settled the Balkans earlier. By the 10th century, the ruling class adopted Slavic language, Orthodox Christianity, and local customs.
Genetically: ~50‑60% Balkan/Neolithic, ~20‑30% Slavic, ~10‑15% Turkic/Central Asian, remainder other. Culturally: Slavic Orthodox, Cyrillic script, folklore blending Thracian, Slavic, Bulgar, and Ottoman layers.
Bulgarians are a Slavic nation with a Turkic‑origin elite that founded the medieval state; the name "Bulgaria" derives from the Bulgars.