Saving Person and their phone number

I have a Workbook that I add a new sheet every week that requires me to add the same people's names and phone numbers to the new sheets.
Is there a way to store a person's name and their associated phone number so I don't have to keep typing in their name?
Thanks!

Thanks MarvinP.
I'm trying to do what the video tutorial is showing me (second link you provided) and I'm not seeing the 'Data Validation'option...
(first pic, from video)

Under my 'Data' heading...

(second pic)

How do I change that setting so 'Data Validation' is available to me?

I can see the very proper way to saving a person name and the phone number. so it really works.

I should have mentioned initially that this was using the ONLINE version of Excel.