Yep. And Ignatius of Antioch (bishop of that city who was familiar with the apostle John, and probably several other apostles as well) is the first person known to use the phrase "Catholic Church," about the year 107 in his letter to the Smyrnaeans (chapter 8). So did Polycarp, bishop of Smyrna (a student of the apostle John).
Catholics didn't come along until about 300 years or so AFTER the 'first christians'!
I guess our early martyrs Polycarp and Ignatius weren't 'first christians' then! If you read paragraph 8 of the link I gave you above, you'll see a very early historical source referring to the Eucharist, authority of bishops, and overall sounds quite Catholic.
Peace be with you.
Did I infer that?
Heck!
We Wesleyans use catholic church, too!
We just don't capitalize it!