merrick

In a sentence

• El nombre del protagonista del libro es Merrick.

  The protagonist's name in the book is Merrick.

  Here (Merrick) is used as a proper noun, specifically a name for an individual in a literary work.

• En el barrio, Merrick es conocido como el mejor jugador de ajedrez.

  In the neighborhood, Merrick is known as the best chess player.

  Here (Merrick) is again a proper noun, referring to a person's name who is recognized for a skill.

• No sé si debo elegir el camino por Merrick o por otra calle.

  I don't know if I should take the route through Merrick or another street.

  Here (Merrick) is understood as a geographical or defined location, potentially a name of a street.