Luxembourg, Luxembourg
San Marino, San Marino
Vatican City, Vatican City
Monaco, Monaco
Andorra la Vella, Andorra
There is no strait and capital with the same name.
Luxembourg (the city) is the capital of Luxembourg (the European country). In other words, the same name is used for both.
Jordan is a Middle Eastern country that has the same name as its capital city, Amman.
The country that has a capital city with the same name as the country and is the largest city in the world is Russia. The capital is Moscow, which is also the largest city in Russia.
That would be Paris, Texas. Paris, France has the River Seine.
The small African country that shares the same name with its capital city is Djibouti.
Luxembourg is a country, but there is a Luxembourg City.
The European country and capital city that share the same name are the country of Luxembourg and the capital city of Luxembourg City.
Georgia is a European country and a state in the US that share the same name.
Kuwait City is the capital of Kuwait. There is no other Middle Eastern country that has a capital, recognized or claimed, that bears the same name as the country in which it is found.
singapore
Singapur