Yes. Jain literature that mentions Neminath (Nemi) and Krishna as cousins mainly comes from:

• Harivaṃśapurāṇa ( Purāṇa tradition attributed to Jinasena)
• Trishashti Shalaka Purusha Caritra (Hemachandra)
• Harivaṃśapurāṇa is also referenced in broader Jain literary traditions as depicting Krishna as a first cousin of Neminath.

In short: these Śvetāmbara-era texts explicitly describe Neminath and Krishna as relatives (cousins). Digambara texts sometimes recount Krishna in the same cosmic framework, but the cousin connection is most clearly stated in the Harivaṃśapurāṇa and related Purāṇic narratives that circulate in Śvetāmbara literature. You can read more here