How do I change my email sender name?

You see, i contact my employer abroad via email. But i don't know how to change my sender's name, which is "Karen cute". It doesn't seem formal, is it? How do I change it? My email address is formal, but that stupid sender's name kept on popping...

When I check my emails the name that shows who the email is from (me) is my old name, I changed my name on my yahoo but it still shows my old name?

besides my email address, my given name is also sent associated along with my email address - How can I change this to the name my friends recognize?

I want to change the name I have displayed as a sender when I send my emails. How can I change it so that I can have my name show instead of the one I made up. I've edited my account settings/profile but it still shows the name I don't want.

When I send an email, it shows in the receivers mailbox with my name in the sender column. I want to change it so my real name does not show.

I used to be able to change my sender name in "mail option" for the yahoo email, since this year, I am not able to, anyone knows how to ?

My brother set up a account years ago it was really cool and he forgot about it i asked if i could have it he said sure so i changed everything got it to what i want and i only have one problem every time i send a email it comes up with the sender name...

How could I change the my own sender name ? The answer I found is four years ago, and now the tool function is changed, so I can't find the place to change. thanks

My personal name comes up when I send an email and I do not want it displayed. I want to change it, how do i do that? Please advise! Thank you!!