Constantine sits next to 4 phonetic neighbors — Constantin, Konstantin, and Constantino are the closest matches by sound. Most share Constantine's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"firm, unwavering"
"payment, redemption (word association)"
"admirable, hawk-like"
"powerful and brave"
"remembered by God"
"people's power"
"peaceful ruler"
"son of Garret, son of the spear bearer"
"destined, determined"
"the Nubian, the southerner"
"noise, tumult"
"from Radley (red clearing)"
"bear warrior"
"metalworker, blacksmith"
"little warrior; little of Mars"
"traveler, one who returns home"
"place of lime trees"
"from the bailey (castle wall)"
"guardian of riches"
"sun, lord"
"champion"
Similar sound: These names share phonetic patterns with Constantine — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Constantine.
Rhythm: Constantine is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.