Most certainly, percentile wise, they're the 99th. Nearly every case where I encountered a name that long though, there was a shorter form. Generally really long names are either patronymic/matronymic (listing ancestors) like many Arabic names, or names following Hispanic conventions. Hawaiian names can also sometimes be rather impressive.

For instance Pablo Picasso's full name is 103 characters (without whitespace): Pablo Diego José Francisco de Paula Juan Nepomuceno María de los Remedios Cipriano de la Santísima Trinidad Ruiz y Picasso