King Chandragupta
Acharya Bhadrabahu, a revered saint of Jainism was contemporary of a King named Chandragupta.
Bhadrabahu's mention is in Parishisth Parvan but not directly with Chandragupta Maurya.
In one version of Bhadrabahu's story, he was contemporary of King Chandragupta of Ujjain who had a beautiful Queen named Suprabha. Bhadrabahu is called son of Somasharma of Devakotta in a region of Pundravardhan.
In Ratnanandi's Version, he was contemporary of King Chandragupti of Ujjain who had a beautiful Queen named ChandraShree.
In Raidhu's Poem, the King Chandragupta is son of Nakula and grandson of Ashoka.
It's tough to say which Chandragupta was associated with Acharya Bhadrabahu but majority of historians opine that the king of Chandragupta Maurya.