ðə ɹˈeɪndʒ wʌz nˈeɪmd mˈaʊnt mˈʌlɪɡən ˈæftɚ pɹəspˈɛktɚ dʒˈeɪmz vˈɛntʃɚ mˈʌlɪɡən baɪ hɪz kˈɑːliːɡz ɪn ðɛɹ wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɛvənti fˈoːɹ ɛksploːɹˈeɪʃən ˌɛkspədˈɪʃən sˈɜːtʃɪŋ ðə hˈɑːdʒkɪnsən ɹˈɪvɚ fɔːɹ ɡˈoʊld.
The range was named Mount Mulligan after prospector James Venture Mulligan by his colleagues in their 1874 exploration expedition searching the Hodgkinson River for gold.