Are the meanings the same?
First name, given name - if there are no middle names, are the two phrases the same?

Last name, surname, family name - are the meanings the same? Thank you.

Question

Are the meanings the same?
First name, given name - if there are no middle names, are the two phrases the same?

Last name, surname, family name - are the meanings the same? Thank you.

Answer

Yes, they're all the same. Even if there are middle names, "first name" and "given name" are the same.

One difference: 
Usually on official documents, you will see: "Family name / Given name"
Usually in casual conversation, you will hear: "Last name / First name"