The name Udmurt probably comes from *odo-mort 'meadow people,' where the first part represents the Permic root *od(o) 'meadow, glade, turf, greenery' (related to Finnish itää 'to germinate, sprout') and the second part (Udmurt murt 'person'; cf. Komimort, Marimari) is an early borrowing from Indo-Iranian *mertā or *martiya 'person, man' (cf. Urdu/Persian mard). This is supported by a document dated Feb. 25, 1557, in which alongside the traditional Russian name otyaki the Udmurts are referred to as lugovye lyudi 'meadow people'.
On the other hand, in the Russian tradition, the name 'meadow people' refers to the inhabitants of the left bank of river general. Recently, the most relevant is the version of V. V. Napolskikh and S. K. Belykh. They suppose that ethnonym was borrowed from the Iranian entirely: *anta-marta 'resident of outskirts, border zone' (cf. Antes) → Proto-Permic *odə-mort → Udmurtudmurt.
The Udmurt population is shrinking; the Russian census reported 637,000 of them in 2002, compared to 746,562 in 1989.
Anthropologists relate Udmurts to the Urals branch of Europeans. Most of them are of the middle size, often have blue or gray eyes, high cheek-bones and wide face. The Udmurt people are not of an athletic build but they are very hardy. and there have been claims that they are the "most red-headed" people in the world. Additionally, the ancient Budini tribe, which is speculated to be an ancestor of the modern Udmurts, were described by Herodotus as being predominantly red-headed.