I called one of my students "Ruby Dixon" by accident today and was momentarily mortified

I, a 7th grade English teacher, have a student with a name similar to Ruby Dixon. I had never consciously even noted the similarity, but apparently my subconscious had because I referred to her in front of my class today as "Ruby Dixon." My students were all puzzled at my goof-up, and as twelve-year-olds are wont to do, briefly pestered me with questions over who the heck Ruby Dixon was. Now, I have said a lot of accidentally weird stuff in my 13 years teaching, but I definitely didn't want the topic of blue alien smut to be among them. Thankfully nobody opened their laptops for a quick a Google, and I escaped internally mortified but unscathed. I have held this in and cringed all day, but I figured you guys might understand. 🥴😂