Guillermina is a distinctive girls' name in United States, ranking #11789 in 2018 with 8 recorded births. The name reached its all-time peak in 1999 with 24 births ranking #4631. Since 1996, the popularity has decreased by 60.0%. In 2018, approximately 1 in every 212,553 girls born was named Guillermina. FALLING Recent data shows the name is currently falling.