One theory holds that the dvandvic union possibly represents an apotropaic application [of "friend"] to the otherwise frightening and dangerous Varuna.
wˈʌn θˈiəɹi hˈoʊldz ðætðə dˈiːvˈændvɪk jˈuːniən pˈɑːsᵻbli ɹˌɛpɹᵻzˈɛnts ɐn ɐpˌɑːtɹəpˈeɪɪk ˌæplɪkˈeɪʃən ʌv "fɹˈɛnd"tə ðɪ ˈʌðɚwˌaɪz fɹˈaɪʔn̩ɪŋ ænd dˈeɪndʒɚɹəs vɑːɹɹˈuːnə.