Languages can potentially make use of two types of constructions, pred
icate nominal or transitive verbal, to express kinship relations betwe
en two individuals. These two types may coexist in a given lanuage as
either virtually interchangeable or semantically distinct alternatives
. In several North American languages the two types have become confla
ted into a single split paradigm. The characteristics of these split s
ystems are sufficiently parallel cross-linguistically to suggest that
they are the result, in part at least, of general properties that cons
train or influence linguistic structure. We claim that this variation
in morphosyntax responds to two factors: an underlying tension in poss
essive relations, which can be naturally given or socially mediated; a
nd the relative pragmatic or propositional orientation of transitive v
erbal versus predicate nominal constructions. Additionally, we show th
at the way split paradigms develop may result from the interaction of
pragmatic and morphosyntactic facets of linguistic systems as communic
ative devices for conveying propositional content and achieving pragma
tic goals.