Hugo sits next to 3 phonetic neighbors — Hugh, Ugo, and Bruno are the closest matches by sound. Most share Hugo's Germanic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mind, spirit, heart"
"lion"
"son of marsh-dwellers"
"God is willing"
"of the Julian clan, youthful"
"fallow land, uncultivated land"
"Christmas, born on Christmas"
"bold journey, brave adventurer"
"Roman pilgrim"
"mythical bird of rebirth"
"southern settlement, south farm"
"one who mills grain"
"lover of horses"
"new house"
"ruler of the elves"
"narrow strait"
"God strengthens"
"narrow water crossing"
"noble, freeborn youth"
"little fire"
Similar sound: These names share phonetic patterns with Hugo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Hugo.
Rhythm: Hugo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.