Jessica Bethany as a first name for a girl?

It's alright but I definitely think Jessica Bethany Camland is enough. The Melanie part adds nothing to the name imo and sounds redundant after Bethany because both names end in the same sound. If you want to add another name I suggest using something that does not end in the "ee" sound. So yeah, while I think having 4 names is over the top, if that's what you are going to do, I think something like Jessica Bethany Melina Camland would flow A LOT better.