The Advaita Guru Parampara is traced from God Himself as Narayana/Sadasiva through Vedic seers, Adi Sankaracharya and his four disciples, Suresvara, Padmapada, Hastamalaka and Totaka. All Dasanami Sannyasis trace their own guru paramparas ultimately through one of these four disciples of Sankaracharya.
Guru Parampara (Guru Lineage)
Version1:
Narayana
Brahma
Vashishta
Sakthi
Parasara
Veda Vyasa
Sukha Brahmam
Gaudapadha
Govinda Bhagavatpada
Adi Shankara
Version2:
Sadhashiva (Lord Siva, rest of them are the same)
Narayana
Brahma
Vashishta
Sakthi
Parasara
Veda Vyasa
Sukha Brahmam
Gaudapadha
Govinda Bhagavatpada
Adi Shankara