Without looking anything up, here's what I've got (only two required any knowledge beyond "what English name does this look like"):
spoiler
| Name | English Name | Comment |
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| | Abya-Yala | | | Afgániya | Afghanistan | | Afrika | Africa | | Aíti | Haiti | | Akrotiri u Dekeliya | | I wonder if I straight-up don't know this or if I just can't recall | Aksá | | If only I could Latin better... | Alaska | Alaska | | Aĺamane | Germany | s/o to español | Alžehi | Algeria | no s/o to français—you know what you did | Andora | Andorra | | Aňgola | Angola | | Aotearowa | New Zealand | s/o to The Brokenwood Mysteries | Apsni | | | Aŕentina | Argentina | | Aruba | Aruba | | Azeriya | Azerbaijan | | Aziya | Asia | | Azoriya | The Azores |
I know what an endonym is, gosh darnit, but I think my excitement at recognizing alemania overrode the hint.