For my ftm transition I chose the name John. Cause it was simple, international and I had no bad vibes to it. Also cause it's kinda timeless, like equally popular for the past 100 years. I carried that name for 9 years. I also chose the additional names Eli, from a book character I liked, and Mikael, from my father.
For my detransition, instead of going back to my birth name Sara which I still hate, I picked a new name: Laura. Mostly cause it starts with the same two letters as my surname so it gives a nice flow to my full name and I can have the initials "L.L.", cause of the vibes I get from it, and it just... idk, resonates with me. I feel like a Laura. It's a bit more rare of a name where I live, but still a "normal" name and spelling, and that appeals to me. For middle names this time around I'm taking back Irene which was my former middle name pre-transition (from my mother), and also adding Anna which is the name of my alter personality (DID thing). At first I thought I'd only add her name if we'd integrate/merge, but then I thought why not add it already. We're technically the same person either way.
So my current name that I chose for my ftm transition when I thought I was a guy is 'John Eli Mikael' and my new name will be 'Laura Irene Anna' followed by my surname.
I'm gonna go through with the process of changing my name legally again now. Or well, next week. Been practicing my new signature now. It will be the third time I'll do a name change, and hopefully the last time. How difficult that process is depends on your location. Here in Sweden, not that difficult. Just fill in a form, send it, pay the price of it, and wait for an approval.