BTW, I didn't know that Irish had accents, and I'm surprised to see that "you" is written the same way in two languages as dissimilar as Irish and Spanish ("tú")
Like city_zen said, Irish is not from Latin. However, Spanish, Irish, Latin and even English are all Indo-european languages, coming from the same source. The English word for you is similar to "tú" as well: thou. 😉
"Thou" comes from the old English þu (thu). So, yeah, they're all just about the same when it comes to "you." Tú, þu, thou, du, ti: all you.