This is the 3123rd most frequent Spanish word.
rogelio
"Rogelio" is a male given name equivalent to "Roger" in English.
Here, 'Rogelio' is a proper noun, serving as a first name.
Rogelio está muy contento hoy.
Rogelio is very happy today.
In this example, 'Rogelio' is part of a book title and specifies the subject of the book.
¿Has leído 'El libro de Rogelio'?
Have you read 'The Book of Rogelio'?
Here, 'rogelio' is a culinary term referring to a specific type of dessert.