1726. Cosmo

Cosmo (née Winkle) is one of the fairies who are assigned to Timmy Turner's fairy godparents. They are considered to replace Timmy's irresponsible and uneducated biological parents. To keep themselves a secret, they usually masquerade as Timmy's pet goldfish and live in a magical castle inside of his fish bowl. Her full name is revealed in "77 Secrets of the Fairly OddParents Revealed".
Timmy is forbidden from revealing their existence, the penalty being to lose them for good, though there are many loopholes to this rule. In the beginning of Season 6, they have the first fairy baby in over 10,000 years, whom Timmy names Poof. It is also revealed in "This Is Your Wish" that Cosmo is directly responsible for many historical tragedies, such as the volcanic eruption which destroyed the city of Pompeii in Italy and the sinking of Atlantis. He also destroyed Pluto in "Vicky Loses Her Icky".  Before Poof was born, Cosmo was the youngest fairy in existence. The fairies color scheme are quite similar to the color scheme of the cover art for the UK and US versions of legendary Punk Rock band The Sex Pistols' only studio album, Never Mind the Bollocks, Here's the Sex Pistols.