No. In Jain Dharma, Bharat and Kartikeya are different names and different figures.

• Bharat Chakravarti is the eldest son of Lord Ṛṣabhdev and an important chakravarti in Jain history.
• Kartikeya is not identified as Bharat in Jain tradition.

So, Bharat is not Kartikeya in Jain understanding.