Short answer: Yes, in Jain literature Krishna is described as a cousin of Neminath (the 22nd Tirthankara), and there are narratives about their meetings.

• In Śvetāmbara traditions, Neminath and Krishna are commonly presented as cousins. The Harivaṃśapurāṇa and related Purāṇa-era texts describe their kinship and the meetings between them, with Neminath renouncing the world on the day of his wedding and Krishna visiting him.
• In Digambara texts, the broader cosmological framework may include Krishna, but the cousin relation is not always emphasized in the same way; the key idea of their kinship appears more prominently in Śvetāmbara narratives.

If you’d like to read a concise Jain Knowledge explanation of this topic, you can read more here