Sakkāya: 'existing group'. 'this word is usually translated by 'personality', but according to the commentaries it corresponds to sat-kāya 'existing group', hence not to Sanskrit sva-kāya 'own group' or 'own body'. In the suttas e.g. M. 44 it is said to be a name for the 5 groups of existence khandha : Sakkāya, o Brother Visākha, is said by the Blessed One to be a name for the 5 groups as objects of clinging upādāna-khandha to wit: materiality, feeling, perception, mental constructions, and consciousness.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.