This paper examines the kinship terminologies and marriage practices of Oenpelli Kunwinjku (Gunwinggu) owners/speakers. These terminologies and marriage practices have been presented as symmetrical, the standard pattern in Australia. This paper shows that first preference marriages are asymmetrical, which is rare in Australia. It further demonstrates that first preference marriages do not produce a transitive terminology, which is even rarer in Australia. Though these patterns are unusual, this paper shows that the Oenpelli Kunwinjku marriage practices accord in a number of important aspects with the marriage practices of owners/speakers of other languages with asymmetrical terminologies, such as the Yolngu (Murngin) terminologies. These common aspects to marriage practices and terminologies are to be understood in light of a more general analysis of the correlations between kinship terminologies, marriage practices, and the construction of ranges and regional identities in Australia. There is significant variation in Australia as to whether people express a predilection for narrow or wide ranges. This paper shows that there are non‐random correlations between predilections for particular types of range, marriage preferences, and types of terminologies. It also shows that terminologies and marriage preferences have a role in the construction of regional identities.