Guillermina is a distinctive girls' name in United States, ranking #6893 in 2004 with 17 recorded births. The name reached its all-time peak in 1999 with 24 births ranking #4631. Since 1996, the popularity has decreased by 15.0%. In 2004, approximately 1 in every 108,007 girls born was named Guillermina. FALLING Recent data shows the name is currently falling.