Francis became "Ajax" after his mutation was triggered and now wants to be called Ajax (named after the Greek hero of great strength) but Wade keeps calling him by his given name as a show of defiance.
Amsterdamsche Football Club Ajax, established in March 1900, is one of the most successful and popular clubs in the world. And they are named unmistakably after the Greek hero, Ajax the Great.
Season 7. The two learned more about each other and started to grown on one another. Eventually the two comforted each other and slept together, not realizing in a few short months, Meg would be carrying a Nephalem, their unborn child, Cassandra Master.
But then, in 4.04 Metamorphosis , Dean says to Sam: Cas said that if I don't stop you, he will. That was the first time he ever calls Castiel 'Cas'. And I wonder if it's because he got a bit comfortable with Cas after 4.03 In The Beginning , when Cas laid a hand on his shoulder and gave him a sympathetic look.