ðə nˈeɪm wʌz fˈɜːst ɹᵻkˈoːɹdᵻd ɪnðə haɪpˈeɪʃən kˈoʊdɛks, wˌɛɹ ɐ kɹˈɑːnɪkəl fɹʌmðə jˈɪɹ wˈʌn θˈaʊzənd tˈuːhˈʌndɹɪd θˈɜːɾi fˈoːɹ mˈɛnʃənz ðæt dænˈɪloʊ ʌv hˈælɪtʃ, wˌaɪl ɐsˈɪstɪŋ ðə kˈiːvæn ɡɹˈænd pɹˈɪnsᵻz ɪn ðɛɹ bˈæɾəl wɪð mˈaɪkəl ʌv tʃˈɜːnɪɡˌɑːv, hæd lˈɪbɚɹˌeɪɾᵻd sˈɛvɹəl tˈaʊnz, ɪŋklˈuːdɪŋ səsnˈɪtsiə.
The name was first recorded in the Hypatian Codex, where a chronicle from the year 1234 mentions that Danylo of Halych, while assisting the Kievan Grand Princes in their battle with Michael of Chernigov, had liberated several towns, including Sosnytsia.