Guillermo vs Pedro
Pedro leads today (#455 vs #901), though both are past their peak.
145 years, head to head
Babies named Guillermo and Pedro per year in U.S. Social Security records, 1880–2025.
Head to head
2025 rank
#901
#455
Babies named in 2025
264
684
Peak year
1996
1999
Trend
Declining since 1997
Declining since 1999
Usually for
Boys
Boys
Lifetime births
32,074
94,083
Try another matchup
Guillermo against names whose popularity has moved like its own.