ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti nˈaɪn fɹˈɔstɹəsˌɪɹ tʃˈeɪndʒd ɪts nˈeɪm tə θˈeɪɚ ænd hˈɪlmɚɹ ˈɜːn hˈɪlmɑːɹsən kəlˈæbɚɹˌeɪɾᵻd wɪð sˌʌm lˈɪɹɪks ænd mˈænɪdʒd ðə bˈænd wɪð ɡˈʌðni ɹˈʌnɑːɹ ˈæɡnɑːɹsən.
In 1979 Frostrósir changed its name to Þeyr and Hilmar Örn Hilmarsson collaborated with some lyrics and managed the band with Guðni Rúnar Agnarsson.