In a conjugation of the Old English (West Saxon dialect) verb beon/wesan, today’s English speaker will recognize the modern forms in:

ic eom =I am
thu eart =thou art
ic waes =I was
ye waere =you were

“You are,” however, was written in West Saxon as ye sind.

Although ye earun or ye aron did exist in a northern dialect of Old English, sind is the word for “are” in most of the Old English literature that survives.

But for a fluke of history, we could just as easily be saying you sind as you are.

An interesting footnote is that English once had three grammatical numbers and not just two.

Modern English has two numbers: singular and plural.

Old English had three: singular, dual, and plural.

Each “number” had its own set of pronouns:
First person:
ic=I
wit =two-person we
we =more-than-two-persons we

Second person:
thu = thou
yit =you two
ye =y’all

Third person:
he =he
hit =it
heo =she
hie =they