Questions & Answers about Kocin yana da iko.
Koci means coach. The form Kocin usually means the coach.
In this sentence, the ending -n is marking definiteness, so it is not a coach but the coach. A learner might mistake -n for a possessive ending, but here it is best understood as part of the definite noun form.
This is very normal in Hausa. Even when you name the subject with a noun like Kocin, Hausa often still uses a subject marker that agrees with it.
So the pattern is:
Kocin + yana + da iko
Here, yana agrees with a third-person singular masculine subject. It is not unnecessary repetition; it is part of standard Hausa sentence structure.
Here yana is a subject marker used with a masculine singular subject in a present/imperfective type of clause.
In very simple learner-friendly terms, it helps build the meaning he is / he has depending on the structure around it. In this sentence, because it is followed by da, the whole expression yana da means has.
So you should learn yana da as a very common pattern.