The personal name Tumko is derived from the base name
Tuma or
Tumyr. It is first mentioned in 1649 in the Register of the Zaporozhian army among the three-syllable names of Cossacks, one of whom appears under the variant name Tumko. Specifically, noted Cossacks of the Kaniv regiment include Tumko Bелітченко and Tumko Vulshansky. Hints at possible semantics for the anthroponymic root
Tuma can be found in the sources.