What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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Yes, it is possible to change the sender name from your name to UKGirlThing. To do that you can add another textbox field with default value as you see below:
Then, you can choose that field as a sender name.
Here is how it works on my side:
If you need further assistance, please let us know. We will be happy to help you.