[SalesForce] Visualforce Email template I used {!relatedTo.owner} showing opportunity owner ID not name

Hi I have created VF email template and send it through workflow action but unable to get Opportunity owner name on recipient name. it is showing that person name who edit the record. Then I used {!relatedTo.owner} but it is showing owner ID not name. below is my VF code

    <p>Dear {!relatedTo.owner},</p>
    <p>Please be informed {!relatedTo.name} is nearing the stage duration planned timeline of 14 days tomorrow.</p>

    <p>Kindly revert back with you plan for us to have the same updated in Salesforce.</p>

    <p>FYI, appended below is a snapshot of the last few activities related to this opportunity:</p>

I need VF email template because I have to pull activity history in this template.
Please help me to pull Opportunity Owner name in this template.

Regards,
Russell