Latin declines masculine, feminine and neuter personal pronouns in the plural as well as the singular. English, on the other hand, uses the generic, gender-neutral “they,” “them” and “theirs.” Note that the English first and second persons are irregular, and neither pronoun can be declined for gender.
Latin pronouns include personal pronouns (refer to the persons speaking, the persons spoken to, or the persons or things spoken about), indefinite pronouns, relative pronouns (connect parts of sentences) and reciprocal or reflexive pronouns (in which the object of a verb is being acted on by verb’s subject).
A personal pronoun works like a noun in one of the 3 persons, which are, predictably, numbered 1st, 2nd, and 3rd. In Latin, nouns, pronouns, and adjectives are declined: endings signify the specific use of the pronouns in the sentence.
Personal Pronouns in Latin  1st/2nd Person Pronouns  Table of Personal Pronouns in all of their cases: I, thou, we, ye . Note: thou is the archaic singular of the archaic plural ye – useful for distinguishing you (singular) from you (plural)
In English, personal pronouns are words like I, you, we, me, he, she, and it. I should mention that in Latin, you will only see a personal pronoun as the subject of a verb when the author is trying to be emphatic.
The personal pronoun exists only in the first and second person. Where a third person pronoun (he/she/they) is necessary, Latin uses one of the demonstrative pronouns (is or ille).