Girl names for Team Green baby

Hubby and I decided to wait until baby is born to know the gender, however, we’re still on the fence on names. If it’s a boy, we’ve agreed on a junior. However, the girl names are what we struggle on. For our third if it’s a girl we want either Serena or Celina. The names that we’ve chosen for our kids are pretty sentimental to our family. They aren’t exact names, but a variation of a name. When my mom was pregnant with me, she always wanted to name me Celina however, my dad felt like they had too much family members named Celina at the time (it was a popular name in the 50s and 60s in the Caribbean and Latin America). So I was thinking on naming our daughter if it’s a girl Celina, however my mom thinks Celina is an old person‘s name and we should go with Serena instead. What do you guys think? Hubby and I like both names and are still on the fence