Two last names field

How can I make a double surname Name field
(Ex: Joe Doe Doe instead of Joe Doe)

In my case the lines looks like this:

<p>First Name: @first_name</p>
<p>Last Name: @last_name</p>
<p>Email: @email</p>
<p>Address: @address</p>
<p>Phone: @phone</p>
<p>Birthdate: @date</p>
<p>Nationality: @nationality</p>
<p>Desired course: @course</p>
<p>Experience:@experience</p>
<p>Education:@education</p>
<p>Abilities: @abilities</p>

I think I should add something to the second line, but I have no clue about what it’s needed in this situation. Any help?

Thank you, have a nice day!