Every time I log into my Gmail account using my correct email address, my husband's name is attached to it. My husband is a Yahoo! user. We use the same computer, but this error just started happening recently. When I email someone from my Gmail account, it appears that the email is sent by my husband. He said he don't think he click on anything to have made this happen. I have tried the recovery page 4 times and shutting computer down.
It looks like your husband's address has been linked to Gmail and set as default.
To check that, go to
Settings > Accounts and Import > Send mail as:.
If in the list there is an address different from yours, make your own the default and delete the other(s).
Note that it's nearly impossible to add a different address to your account by mistake, and it requires knowledge of both your account and the one to add (you can read more about that at https://support.google.com/mail/answer/22370).
Maybe you or your husband was trying to configure automatic forwarding and picked the wrong section.
If that's the goal, see https://support.google.com/mail/answer/10957 to forward from Google.
Looks like forwarding from Yahoo has been disabled (see https://my.help.yahoo.com/kb/new-mail-for-desktop/automatic-forwarding-emails-free-yahoo-mail-accounts-discontinued-sln35503.html).