I don't know if you're after opinions or more suggestions so I'll give both:
Jaxson - I like the name. It looks like you've mixed up both spellings though. I've taught Jaxons and Jacksons but never a Jaxson. I'd pick one of the two more established ones, personally.
Molly - I like it. Not the most exciting name in the world but names don't need to be.
Lexi - It's ok but I'd only really consider it as a shortened form of Alexandra.
Madison - I quite like it. Never actually met one despite it being pretty common in the UK as well as the US for a while now.
Other names that give me the same vibe:
Girls:
Avery, Amber, Aubrey, Addison, Ashley, Abbie, Ava, Brooke, Bonnie, Chloe, Casey, Callie, Darcey, Daisy, Ellie, Everly, Eden, Fallon, Freya, Gracie, Halle, Hadley, Hayley, Holly, Harper, Isla, India, Josie, Jasmine, Kayla, Kayleigh, Kendra, Lily, Lacey, Lola, Luna, Macie, Miley, Mackenzie, Millie, Mia, Nyah, Nevaeh, Olivia, Paige, Piper, Peyton, Paisley, Quinn, Ruby, Rosie, Riley, Savannah, Sienna, Sierra, Sabrina, Shannon, Summer, Tia, Taylor, Willow, Zoe
Boys:
Ashton, Alfie, Archie, Braxton, Brodie, Cole, Callum, Conor, Carter, Chase, Dexter, Dylan, Evan, Fitch, Harley, Harvey, Hunter, Harrison, Jack, Jake, Joe, Kyle, Kai, Logan, Lewis, Liam, Morgan, Nathan, Oliver, Oscar, Parker, Preston, Quinn, Reuben, Riley, Rhys, Ryan, Rio, Tyler, Tye, Tanner, Tate, Zach