Avanti: Although Buddhism spread to Avanti during the Mauryan period, it wasn't directly connected to the life of the Buddha. Gandhara: While Gandhara became a significant centre for Buddhist culture and art later in history, it wasn't directly associated with the Buddha's life.
Thus, Avanti and Gandhar have no direct relation with Buddha's life. Kosala: This was the kingdom where the Buddha was born, with his birthplace being Lumbini (present-day Nepal). His mother's family belonged to the Kosala dynasty. Magadha: Though the Buddha didn't spend a significant amount of time here during his early life, he travelled and taught in Magadha. Notably, the city of Rajgir (present-day Bihar) was an important centre where he interacted with King Bimbisara.