The study provides a comprehensive comparative, typological, and diachronic analysis of kinship and affinity terminosystems across three typologically diverse languages: English (Analytical/Germanic), Russian (Inflectional/Slavic), and Uzbek (Agglutinative/Turkic). Using componential modeling and corpus-driven verification methods based on data from the British National Corpus (BNC), the Russian National Corpus (RNC), and the Uzbek National Corpus (UzNC), the author reconstructs the evolutionary trajectories of social nomenclature. The paper highlights the Middle English lexical shock and the subsequent emergence of the symmetric "in-law" analytical subsystem, contrasting it with the persistent inflectional asymmetry and precise lexicalization of separate affinal slots within the Russian system, as well as the profound ethno-pragmatic density (P_eth) of the Turkic kinship matrix, where age and gender boundaries remain strictly unneutralized. The results demonstrate that while Western European terminosystems evolve toward legal abstractness and semantic economy, the Uzbek terminosystem preserves its anthropocentric and ritual-etiquette framing.