This is the 1734th most frequent Spanish word.
esteban
"Esteban" is a Spanish proper noun, equivalent to "Stephen" in English, often used as a male given name.
Here, the word 'Esteban' is used as a proper noun representing someone's name.
Esteban es un buen amigo.
Esteban is a good friend.
In this sentence, 'esteban' appears to be a typo or nonstandard usage, as the correct construction in proper Spanish uses 'estaban', indicating the third person plural of the past continuous tense.
Se esteban preparando para la fiesta.
They were preparing for the party.
Similarly, 'esteban' in this context seems misused; it should likely be 'estaban' to correctly align with standard Spanish grammar.