Guillermina is a distinctive girls' name in United States, ranking #8899 in 2006 with 13 recorded births. The name reached its all-time peak in 1999 with 24 births ranking #4631. Since 1996, the popularity has decreased by 35.0%. In 2006, approximately 1 in every 146,236 girls born was named Guillermina. FALLING Recent data shows the name is currently falling.