He [Droṇācārya] is certainly still existing, being represented by his son. His wife Kṛpī did not undergo a satī with him because she had a son.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
स एष भगवान् द्रोणः प्रजारूपेण वर्तते । तस्यात्मनोऽर्धं पत्न्यास्ते नान्वगाद्वीरसूः कृपी
sa eṣa bhagavān droṇaḥ prajārūpeṇa vartate | tasyātmano'rdhaṃ patnyāste nānvagādvīrasūḥ kṛpī
SB 1.7.45