Yo
I (used to refer to oneself)
Tú
You (singular, informal)
Él
He (used to refer to a male person)
Ella
She (used to refer to a female person)
Usted
You (singular, formal)
Nosotros
We (used by a group including at least one male or a mixed group)
Nosotras
We (used by a group of females)
Ustedes
You (plural, formal or informal in Latin America)
Ellos
They (used to refer to a group including at least one male)
Ellas
They (used to refer to a group of females)