Fergus sits next to 4 phonetic neighbors — Marcus, Angus, and Gus are the closest matches by sound. Most share Fergus's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"man of vigor"
"strong, powerful (Roman association)"
"son of consolation"
"from Evreux, from the Evreux region"
"Trey's town, three's farm"
"land surrounded by water"
"strong, enduring, firm"
"rocky land"
"modern phonetic variant of Jacob"
"divine mother goddess (Irish)"
"strawberry grower"
"ocean, sea (from Kai)"
"thicket, small wood"
"supplanter, one who grabs the heel"
"variant spelling of Caden/Kaden"
"ray of light and land"
"fame and glory"
"from Athens"
"poet; philosopher"
"faithful, genuine, true"
Similar sound: These names share phonetic patterns with Fergus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish origins, giving them the same cultural heritage as Fergus.
Rhythm: Fergus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.