Definition of "Carl"

Of course you know that Carl Duruside, or 'Doctor Carl', as he is always called by almost anybody, is my husband's brother?

1882, “Doctor Carl”, in Frank Leslie's Pleasant Hours, volume 31, F. Leslie Pub. Co., page 293

And Thomas Carlyle is nine. They call him Carl, and he has a regular mania for collecting toads and bugs and frogs and bringing them into the house.

1919 Lucy Maud Montgomery, Rainbow Valley, 1st World Publishing (2007), page 19

I'd weave through the throng — scanning for empties to return while flirting, sniffing out kids smoking grass and sharing smokes with Ivor and Carl on the door. With a name like Carl you can imagine a six-foot tall and wide bouncer, but Ivor...

2004, David W. Scott, The Disillusioned: A Story of Our Times, Fraser Books, page 204

Located in rural Minnesota, Carleton is not surrounded by any cultural diversity unless you count pig farms and cow farms as separately diverse institutions. The nice thing about Carleton is that Carls are pretty much non-judgmental […]

2005, Adam Zang, Jendrey Julie, Chris Mason, Carleton College