This is the 6813th most frequent Spanish word.
cuéllar
"Cuéllar" is a proper noun, typically referring to a town in Spain.
In this sentence, 'Cuéllar' refers to a proper noun, specifically the name of a town.
Hay un pueblo llamado Cuéllar en España.
There is a town named Cuéllar in Spain.
Here, 'cuello' (the root word of 'cuéllar') is used to refer to the collar of a shirt, and 'cuéllar' as a derivation could imply something related to the neck or collar.
Compré una camisa con un bonito diseño en el cuello.
I bought a shirt with a nice design on the collar.
In this sentence, 'Cuéllar' is used as a surname and carries no direct grammatical link to the word 'cuello' for neck.