This is the 484th most frequent Bulgarian word.
стоянов
"Стоянов" is a Bulgarian surname derived from the given name "Стоян" (Stoyan), meaning "descendant of Stoyan."
Here, 'Стоянов' is used as a proper noun to specify a surname.
Стоянов е фамилното име на моя учител по математика.
Stoyanov is the last name of my math teacher.
In this instance, 'Стоянов' is being used as a nominative singular masculine to refer to a person.
Запознах се със Стоянов по време на конференцията за технологии.
I met Stoyanov during the technology conference.
Here, 'Стоянов' denotes a form of address, preceded by courtesy title 'господин', accentuating respect.