She is named right after Carlos' late mother. In Season 7, Carlos learns that Juanita was switched at beginning with Grace Sanchez (Cecilia Balagot), and that her organic mother and father are Hector and Carmen Sanchez (Ronaldo Molina and Carla Jimenez, respectively). So if you are likely to sign up a own area identify in any case (or not!), you may want to test them.