Velychko (Ukrainian: Величко) is a Ukrainian surname. It is the Ukrainian cognate of Velichko. Its feminine counterpart is Velychka.
Notable people with the surname include:
Oleksiy Velychko (born 1954), Ukrainian football coach Samiilo Velychko (1670–after 1728), Ukrainian Cossack Serhiy Velychko (born 1976), Ukrainian footballer
See also Samiilo Velychko Chronicle, 18th century Ukrainian chronicle
References