Sant Tukaram (1608-1649) was indeed a contemporary of Chhatrapati Shivaji Maharaj (1630-1680). Tukaram was a prominent Marathi saint and poet of the Bhakti movement who lived in Dehu, near Pune, during Shivaji's reign. Chaitanya was a Bengali saint (1486-1534), Namdev was a 13th-14th century saint, and Shankaracharya refers to Adi Shankaracharya who lived in the 8th century - all from different time periods.