Alternatively, it can be patronymic, son of Falk/Falco, a West Frisian given name.
[1][2] There were 4380 people with the surname in the Netherlands in 2007.
[3] The name Valk in Estonia (895 people)[4] may be related to the town Valka.
As of 2014, 61.8% of all known bearers of the surname Valk were residents of the Netherlands (frequency 1:3,165), 14.3% of the United States (1:292,986), 8.7% of Estonia (1:1,758), 3.5% of Germany (1:268,323), 1.8% of Canada (1:243,695), 1.7% of Brazil (1:1,372,565), 1.3% of Russia (1:1,222,807), 1.3% of Australia (1:214,179), 1.3% of New Zealand (1:41,921) and 1.0% of France (1:791,757).
In the Netherlands, the frequency of the surname was higher than national average (1:3,165) in the following provinces:[5]