Although the "Purusha Sukta" uses the term "rajanya", not "Kshatriya", it is considered the first instance in the extant Vedic texts where four social classes are mentioned for the first time together. Usage of the term "Rajanya" possibly indicates the 'kinsmen of the Rajan' (i.e., kinsmen of the ruler) had emerged as a distinct social group then, such that by the end of the Vedic period, the term "rajanya" was replaced by "Kshatriya"; where "rajanya" stresses kinship with the "Rajan" and "Kshatriya" denotes power over a specific domain. The term rajanya unlike the word Kshatriya essentially denoted the status within a lineage. Whereas "Kshatra", means "ruling; one of the ruling order".