Looking for more Nigerian heirloom crops to honor my family's generational roots.

Morning folks! I'm searching for more assistance in finding more types of Nigerian heirloom crops other than the Nigerian sunflower, which I found somewhere online. I'm looking first for the yams which are grown by both native Nigerians and their descendants in the diaspora. My folks have Nigerian ancestry in the them. I wanna keep the memories and roots going in my horticulture. Please drop by to this box if you all have anything to add. Peace always!

How about Uga?

I wonder whether the factsheets from Garden organic UK may have some useful information for you? They probably can't send seeds, but they have some factsheets on unusual crops for crops not normally grown in the UK. There are some African food crops listed, but I can't say whether they are likely to be grown in Nigeria.

Was the uga originally from the Americas? Every pumpkin has to be from there right?

I don't think it's a true pumpkin.

The proper name is Telfairia occidentalis.
There are others in the genus, which is native to Africa:
https://en.m.wikipedia.org/wiki/Telfairia

It's primarily grown for the leaves and seeds.
The seeds are often made into Ogiri, a fermented seed condiment.
Between the oil and the protein the seeds seem to serve the same role as okra, which is also a  traditional West Africa plant.

Could we grow that one or any other Nigerian plant in the north hemisphere where temps freeze more? I'm in between zones five and six in the Midwest and which ones do well in Midwest summers?

Blake Lenoir wrote: Could we grow that one or any other Nigerian plant in the north hemisphere where temps freeze more? I'm in between zones five and six in the Midwest and which ones do well in Midwest summers?

Many gourds are quick growing annuals, so it will be more how long and hot your summer is than how cold your winter is. You may need to start under cover for example - that is the norm in the UK for crops like tomatoes and sweetcorn.

There are the Yoruba people, indigenous ones from Nigeria as well as others. I've tried to look for heirloom crops from these people, but had no luck. Anybody has any idea where could I find these type of crops from as well as from the Igbo people? The Igbo are known for yams and have grown them for centuries.

Out of interest I did a little internet searching on Yoruba and came up with a couple of sites that may be helpful for you (I usually use duckduckgo rather than google, although I gather Brave is even better if you are doing a less usual search).
this one has a bit about yams - their cultural and culinary use. I suspect that the African yams won't be much use to you since they are perennials that will need tropical temperatures year round. You may be able to grow them as a house plant perhaps. Dioscorea japonica or Diasorea batatas (japanese and chinese yams) would be more likely to grow for you, but even these may need bringing in during winter in colder climates. They are very tasty - like baked potatoes. There are a few threads here on Permies about them.
This one is more a recipe thread about different dishes cooked in Nigeria, but may give some ideas for different crops you could try perhaps.