In Jainism, Kevalgyan (Kevala Jnana) is the highest form of knowledge, meaning omniscience—complete and absolute knowledge attained by a soul who has destroyed all karmic bonds obscuring its true nature. The attainment of Kevalgyan is a profound spiritual achievement described in Jain scriptures.

As for the kothiba fruit, there is no direct connection or mention of a "kothiba fruit" in Jain scriptures or teachings related to the attainment of Kevalgyan. Jain texts primarily discuss Kevalgyan in the context of spiritual practices such as right faith, right knowledge, and right conduct (Samyak Darshan, Samyak Jnana, Samyak Charitra) and through the process of shedding karmas.

If you are referring to a symbolic or allegorical meaning of any fruit in relation to Kevalgyan, Jainism sometimes uses fruits (like the mango) as a symbol of the sweet result of spiritual effort, but "kothiba fruit" specifically is not mentioned in canonical Jain literature.

If you have further questions about Kevalgyan or symbolism in Jainism, please clarify!