To pronounce “Guillermo” correctly, break it down into syllables: “gee-yer-moh.” The “G” is a soft “h” sound, like in “gentle.” The stress falls on the second syllable, “yer.” The “i” is pronounced with a short “ee” sound, like in “feet.” The “o” is pronounced like the “oh” in “home.” Remember to roll the “r” slightly for a proper Spanish pronunciation.