Pretty sure that's my true name, given that I'm a woman, that I've known that I was a woman since I was six, and the only reason I didn't come out earlier - in spite of numerous people both online and offline knowing I was more feminine than masculine - was because I had been viciously bullied over my autism and didn't want something else to make me a target.
I chose my first name, paying homage to my parents giving me a "J" name, paying homage to my grandfather's middle name by keeping an "a", and then my computer name, "Mem", what I've been called in multiple places. Hence, "Jemma". I took the utmost care in choosing that name for myself, as carefully as any parent would choose their child's name, and respecting both parents' choice in giving me my original name.
So, yes, I chose my first name. Why? Because someone as blatantly transphobic as my dad obviously wouldn't and has continued to needle, torment, harass, and scream at me - even when we're not even talking about it - because of no reason other than the fact that I'm a transwoman.
"Tutu" is a nickname. Full stop. He has used it as a nickname because apparently "Chatarius" is too hard for others to say (newsflash: it isn't). If Mr. Atwell comes on here and states that he wants me to call him by his nickname - or even if he makes a tweet about preferring the name "Tutu" over his name - I will gladly call him by that nickname out of respect. Until then, I will refer to him by his given name, again, out of respect for the name that his father had, out of the care that both of his parents had for choosing his name.
Also? You want the word "hypocrisy". You want to call someone out on it? Make sure you actually spell it right.