Gus sits next to 3 phonetic neighbors — August, Angus, and Gustav are the closest matches by sound. Most share Gus's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great, venerable"
"the promised land"
"aspirations, wishes"
"strong, upright"
"from the west farm"
"one who hears, God has heard"
"son of Case; from the marsh"
"tile maker, one who tiles"
"spirit, divine inner power"
"king of birds (folkloric)"
"worshipper of Yahweh"
"Yahweh has shown favor"
"wise as a wolf"
"ewe herder"
"wealthy, kingly, upholder of good"
"wolf counsel (via Old Norse Ralph)"
"sprout, bud"
"brave bear, strong as a bear"
"God is gracious"
"from the mouth of the Roe river"
Similar sound: These names share phonetic patterns with Gus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin (Augustus) origins, giving them the same cultural heritage as Gus.
Rhythm: Gus is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.