Hi Melinda,
do you have the Contact Owner synced to your database?
If yes, just use the data field and set in the email settings the sender name etc as a Token (just Drag and Drop into the Fields where you need a token) like that:
From Name: {{lead.Lead Owner First Name}} {{lead.Lead Owner Last Name}}
From Email: {{lead.Lead Owner Email Address}}
You can also set default values for users where you don't have a Lead Owner.
Hope that helps.
Best regards
Steffen