First Google+ account: Raj Pudota, June 2011
Google+ had only been live for a few weeks when Brian White decided he wanted to know who owned the earliest Google+ profile. White was a Google employee on the Search side of the operation, but instead of just going to his colleagues on the Google+ team and asking, he did some mucking around in Google's sitemaps and robots.txt files and declared that the earliest profile (probably) belonged to one Raj Pudota. Pudota is mysterious: that profile is basically empty, containing only a link to a nonexistent Picasa account. There's also a Twitter account in that name that only has three tweets.