Okay... I've a couple of nicknames and they're all rather strange, but since I'm such a nice person I thought I'd share them with you...
My best friend at uni call me Sandis - my surname's Sandberg MacGuinne
Some other friends call me Guinness, and no, I do not have a strange obsession for Guinness, but look at me surname and you'll get it...
Some of my best friends from high school call me Morot, carrot in English, and yes I do have red hair
My grandparents (and my mother when she lived) call me Josse, which is a common way to shorten both Johan, Johanna and Josefine in Swedish
My sister call me Pou-Pou and only God knows why, it's really the most embarrassing nickname ever, imaging having something calling Pou-Pou at the top of their lungs in order to get my attention at e.g. a festival... On the other hand, I call her Plums, but well...
And all my German friends call me Jo-Jo...
My Scottish friends and relatives with a bit of Gaelic call me Eòghan Beag - little Eoghan - or An t-Suaineach - the Swede ...