my emails on husband's ipad still

Assuming that your husband requires his own email be accessible from the iPad, he will need to add his email account(s) to the iPad:

Add an email account to your iPhone, iPad or iPod touch – Apple Support

Be aware that iPad is a single user device - not shared. Unless the iPad is properly wiped and prepared for a different user, sensitive data (e.g., Contacts, Calendars, Reminders, Notes, Messages, Contacts, Keychain - including passwords etc.) may be unexpectedly shared between users.

If you intend to pass the iPad to a different user, you should prepare the iPad properly - after which it can be setup “as new” for the new user:

What to do before you sell, give away or trade in your iPhone, iPad or iPod touch – Apple Support