Amelia Margaret Tenielle ... and ... Oscar Francis Justin

my DD has two middle names and i find alot of paperwork, mail, etc it often is the first middle name mentioned or intial seen and not so much the second middle name (so yeh keep that in mind and i think by putting the names most important to you as the *first* middle name) ... i also chose the names above cause they flowed and sounded nicer in that order
I agree. I think that Oscar Justin Francis flows a bit better (although I like Francis Justin without the Oscar), but I think order of importance matters more.

BTW I love your choice of first girls name. 'Tis DD's