Eternally yours - 1939

A great love story, and yet not the movie I'd watch again, I didn't like it very much.
Anita (Loretta Young) is to marry Don (Broderick Crawford) but when she goes with her friends to see the show of the Great Arturo (David Niven) it's love at first sight. They get married and she works with him in the show. They are extremely in love and happy. One night, at a reporter's party, he gets drunk and apparently - as he reads in the paper the next day - he boasted around that he could even jump out of a plane handcuffed... and now the world expects him to do it. Anita is strongly against it, and he promises that he won't do it, but then he sees all the fans cheering, waiting only to see him, and goes through with it. She's mad at him, and again he promises that he won't do it again. And again he breaks his promise, and they start a tour all over the world, where he performs it again and again. She gets tired of that life, and has secretly bought a house for them.
They had planned a vacation, where she planned to take him to the new house, when he informs her that he has signed a contract for a new tour around the world. She tries to talk to him but he won't listen to her, saying that it's not for them to settle down, to have a house, that they're happy the way they are. His slogan on the papers is "the great Arturo sees all, knows all" but it seems that he can't see her and doesn't know a thing of what she wants.
One day after a show he finds a message where she tells him that she's gone, that they've come face to face with reality, that "I cannot go your way any longer and I know you'll never go mine. This is good-bye".
It's a huge blow for him, and he starts looking everywhere for him, but she hasn't gone home. He keeps looking for her and asking about her, until he's told that she's divorced him. He tries to go on with his life. Anita marries Don, in an attempt to move on, but she knows very well that it's not Don that she really loves.
After the marriage, Don's boss invites them at a party, and Tony is there to perform. When they meet again, he does all he can to talk to her and to see her again. On another occasion he asks her to be his assistant, and as much as she begs Don to get her out of it he doesn't because he doesn't want to go against his boss' wish. Tony hypnotizes her, explaining that in a state of post-hypnosis she'd do anything he orders to do, but only the things that she wants to do. He could never order her something that she wouldn't want to do. She hands a cigarette to a lady, a flower to another, and then goes to him and kisses him. That night he tells Don that he thinks she still loves him, and the next day he talks to her alone, and she admits that she still loves him, that she left so he'd be free to live the life he wants, and that there's nothing he could do to patch things up, because he doesn't need her , he doesn't need anyone but himself.
Tony prepares for another performance, another jump off a plane, and is trouble to see that he won't be on the same plane where he hid the picklock, and yet he goes through with it anyway. Anita is attending, and suffers terribly watching him fall down. He's successful enough, but not completely. When he's pulled out of the water Anita runs to him, and when he finally opens his eyes she hugs him and cries, and is obvious to anyone watching, even to Don, what she really feels.
In the last scene of the movie Anita and Tony enter their house in Connecticut.

I don't understand why Tony went under the name "great Arturo", what has Tony to do with Arturo?