email problem on macbook air

On my macbook air when i go to type in my address to send myself an email to my gmail address, it has started to come up as "holidays in the united states" and then my gmail address. i have no idea why this started today all of a sudden. i went in to preferences, account information, description, and no where do i see where this is showing nor how i can change it. this is happening only on my macbook air not my phone or iPad. i checked my contacts and nowhere do see this.

help!