Marie long and short-WDYT?

So we are discussing [name]Marie[/name] vs. [name]Marie[/name]-[name]Pierre[/name]. If we go with [name]Marie[/name] it’ll be a middle name and if we go with [name]Marie[/name]-[name]Pierre[/name] it’ll be either middle or first, undecided on that. What do you think?