What is the relationship between el salvador and san salvador

El Salvador, officially called the Republic of El Salvador is the smallest country of Central America. On the other hand, San Salvador is the capital and largest city of this country. That's the relationship between them. The country had a population of approximately 6.34 million in 2016. The official language of El Salvador is Spanish and has a surface area of 21,041 km².

these are the words to choose from to people answer the question:

nieta--yerno--tia--tio--primo--nuera--abuelo--cunada