Meaning and Name Origin
Guillermo▼ has 36 related variations via Guillaume, William: Bill▼, Bille, Billie▼, Billy▼, Gillermo, Guglielmo, Guilherme, Gwillyn, Gwilym, Liam▲, Vilhelm, Villem, Wilek, Wiley▼, Wilhelm▼, Wilhelmus, Wilkes, Wilkie, Wilkinson, Will▼, Willem, Willhelmus, Willi, Williams▼, Williamson, Willie▼, Willis▼, Willkie, Wills, Willson, Willy, Wilmer▼, Wilmot, Wilmott, Wilson▼ and Wim.
Guillermo is a very prominent first name for men (#379 out of 1220, Top 31%) and also a very prominent last name for both adults and children (#9828 out of 88799, Top 11%). (2000 U.S. Census)
Displayed below is the birth name popularity of Guillermo for boys. Guillermo was first listed in 1900-1909 and reached its apex rank of #352 in the U.S. in the year 1996, and is at #678 currently. (2014 Birth Statistics)
Displayed below is a comparison of the popularity of Guillermo and related names. Popular variation forms of Guillermo (#678 in 2014) listed in the Top 1000 are Liam (#2 in 2014), William (#5), Wilson (#594), Willie (#722), Will (#763), Billy (#794), Willy, Wilmer, Billie, Willis, Wilhelm, Wiley, Williams and Bill. Usage of these boy names was at its highest during the years 1920-1929 and is now significantly lower, with versions such as Billy, Will, Guillermo, Willie and Wilson falling out of style. Liam (#2) is the most contemporarily stylish baby name among these. (2014 Birth Statistics)