The personal name Tomylo is formed through a truncated-prefix method using the suffix -ylo from the two-root name Tomysław. The prepositional component of this name originates from the verb "tomyty," which means 'to tire, to torment.' An example of the usage of this name in Ukrainian written records can be traced back to numerous entries from the 16th to 17th centuries. For instance, in 1552, mentions include: Tomylo Sevruk from the city of Kyiv, as well as Tomylo Kuzmynych and Voyno Tomylove. In the city of Lutsk, there are references to Yatsko and Tomylo Voronychi, as well as Tomylo Shvets. In 1563, Tomylo and Trokhym Nekrasovych are mentioned, as well as Tomylo Hontchar from the city of Kremenets. In 1569, Tomylo Stepanovych is recorded, and in 1582, Mr. Tomylo Mantsevych from the city of Zhytomyr is noted.Additionally, in 1649, there are mentions of Cossacks named Tomylo, such as Tomylo Pavlovych from the Korsun regiment and Tomylo Semyenenko from the Kyiv regiment. Moreover, there are surnames linked to this name, such as Lesko Tomylenko and Ostap Tomylyenko. The name Tomylo was most popular among Cossacks, as evidenced by the records from the Kharkiv census of 1650, where, for example, Tomylo Andreienko is listed.