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.
Since I don't have a lot of information about this specific story, it's hard to say exactly who Mike Ross is. He could be an ordinary person with an interesting personal story that involves some sort of growth or change symbolized by 'big boy pants'.
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.
Miss Emily Grierson herself can be seen as a symbol of the dying Old South. Her decaying mansion represents the decay of the old social order. The rose in the title can be a symbol of love or pity for her. She was once a lady of high standing but as time passed, she was left behind, just like the Old South was being replaced by the new era. And her actions, which seem so out of place in the new society, are like the last gasps of the old traditions.
I don't have enough information to determine exactly who Emily Hanford is in this context. She could be a journalist, an author, or someone involved in the media industry.