I’d politely ask that other people respect these conventions. (In particular, I’d prefer if people did not write “Eta”.)
If lowercase is not available, uppercasing the whole thing is okay (“ETA”), but has a tendency to be confused with estimated times of arrival.
I pronounce my name /iːtə/ (guide to symbols), but I don’t mind if you choose to say it differently.
I have another legal name, used for things like WHOIS entries, legal contracts, and certain older real-life relationships. I don’t really like that one, but changing it everywhere is too much effort. Consider it an implementation detail.
Inspiration for this page taken from iliana etaoin.