Need a name..

Our 3rd child is due in May and we don't know the sex of the baby (yet). We have 2 girls--Mariah Nicole andMadison Natalia--the obvious dilema?? I now need to find another M name followed by another N middle name--or do I not do that and risk the 3rd feeling left out or something?? We didn't really do this on purpose--our oldest Mariah chose Natalia as the middle name for her sister before we knew what we were having ... Madison was just what we came up with to go with Natalia... Soooo... any suggestions??

These are some ideas I found  
Mackenna
Morgan
Mabelle
Mackenzie
Marie
Natasha
Noel

Thanks! I love the name Morgan--and I think it could go for either a boy or girl ( although I probably wouldn't use it for a boy)--My husband likes Maddox for a boy--(thank you Angelina Jolie for this one)

Maddox is a really cool name, For some reason i thought you said you were having a girl so i looked up some really girly names, opps. lol. Morgan would make a very good boy name. I actually think I like it better for a boy than a girl.

Mallory Natasha
Mallory Noelle
Margaret
Nadine, Nora, Naomi,
Marissa

Michaela
Mallory
Melinda
Melanie
Madeline(line)
Madelyn(lynn)
Melissa

Matthew
Michael
Maxwell
Mark
Marshall

Noah
Nathan
Nathaniel
Ned

Girl "M" Names
Macie / Maisie / Maylie/Marley/ Miley
Malia
Mya or Maya
Maura
Marilynn
Mirabelle / Meira
Mischa / Mia
Mishaye / Marshaye
Mona / Monet
Monica / Monique
Megan
Maggie
MaKara
Meadow
Marina
Marilee / Merridy
Mattea
Maxine
Mayra / Myla
Melody
Memphis
Mindy / Melinda
Mercia (Mersha)
Meredith
Misty
Morrigan

Girl "N" Names
Nell / Nella / Nellie
Nerissa
Nola / Nona / Noralie
Nichelle
Nessa
Neve / Neva
Nia / Nina
Noelani
Nadia
Novalee / Novia / Nova
Nyla
Nevaeh / Nivea
Nerina
Neola
Neely
Naveen
Nicolette
Natalie
Narcissa / Narcisse
Nanette

Boy "M" Names
Mack
Malcolm
Madden
Mandell
Manning / Manny
Mario
Marlon
Martin / Marty
Mateo / Matteas
Maury / Maurice
Maxton
Micah
Miles / Milo
Milton
Mitchell / Mitch
Montana (can be girls name too)
Montgomery
Morrison
Murphy
Myron

I LOVE the name Maddox though, I think you should use that if you have a boy.
Boy "N" Names
Nash
Napoleon
Nehemiah
Neil
Neville
Nevan
Newland / Newman
Nigel
Niles
Nixon
Nolan
Norman
Norris
Nox

Thank you all for the great names!!! I saw quite a few that I really love that we didn't think of... Michaela is beautiful and Malia and Mattea.. funny--I focus more on girl names too!! Is that a sign????? My husband said "with my luck it's another girl" but he says that jokingly--he's an absolute pushover for our girls--they have him wrapped right around their little fingers!!! I think a boy would be just weird! I would love to have one, but I don't know--I already know what to expect with a girl--and all that pink!!!! I guess either way, it doesn't matter what we get--healthy and happy (on time would be nice...)