They're not the same. Everett Ross and Thadius Ross have separate identities and storylines in the comics. Their powers, if any, and character arcs are completely different.
In a more light - hearted scenario, Emily could be a mischievous pet, like a cat or a dog that has run away, and the 'catching Emily' part is all about the family trying to bring their beloved pet back home.
I'm not sure specifically who 'ann b ross' is just from this phrase. It could be an author. Maybe it's someone who has created works within the realm of 'fantastic fiction' which might include elements like magic, otherworldly beings, or extraordinary adventures.
In the 'Emily Rose Story', Emily Rose is a girl who has to endure the horror of being possessed. She is the one that everyone in the story is either trying to help or figure out what's wrong with. Her experiences are what drive the whole story forward.
The Betsy Ross story is based on historical accounts and tradition. However, historians continue to debate and research certain elements, so we can't be completely certain of its absolute truth.
It is a very complex and poignant story. The main character, Emily, is a symbol of the old South. Her life is full of isolation and mystery. The use of the rose in the title can be seen as a symbol of love, pity or a tribute to her in a way.