were did the TIV people come from?

Answer 1

Quoted from website linked below:
Igboland is the home of the Igbo people and it covers most of Southeast Nigeria. This area is divided by the Niger River into two unequal sections – the eastern region (which is the largest) and the midwestern region. The river, however, has not acted as a barrier to cultural unity; rather it has provided an easy means of communication in an area where many settlements claim different origins. The Igbos are also surrounded on all sides by other tribes (the Bini, Warri, Ijaw, Ogoni, Igala, Tiv, Yako and Ibibio).

The origins of the Igbo people has been the subject of much speculation, and it is only in the last fifty years that any real work has been carried out in this subject:

...like any group of people, they are anxious to discover their origin and reconstruct how they came to be how they are. ...their experiences under colonialsim and since Nigeria’s Independence have emphasized for them the reality of their group identity which they want to anchor into authenticated history. (Afigbo, A.E.. ‘Prolegomena to the study of the culture history of the Igbo-Speaking Peoples of Nigeria’, Igbo Language and Culture, Oxford University Press, 1975. 28.)
END QUOTE

The second link listed is for a book about the Tiv people and their history. Hope this is what you were looking for.

Answer 2

Sorry. There is no geographical surround of the Igbos by Tiv people. It is the Idomas. The Tiv have a southern geographical surround with northern Cross River tribes they call"udam".