Mister sits next to 4 phonetic neighbors — Mister, Dexter, and Foster are the closest matches by sound. Most share Mister's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"courtesy title for an adult man"
"personal royalty, regal one"
"God will add, God increases"
"of Ibelin (place name origin)"
"anointed one who carries"
"enthusiasm, ardor, passion"
"son of the angel, angelic descendant"
"bright settlement"
"modern compound: Mc (son of) + Aiden (little fire)"
"ruler, sovereign (Greek/Latin influence on Tyrant root)"
"one who fulfills, generous"
"prickly plant, briar patch"
"evergreen flowering shrub of the Mediterranean"
"cheerful, lively, in high spirits"
"mythical guardian creature"
"from the town by the sea"
"bold king, royal ruler"
"he who descended, to descend"
"ruler of the army (via Walter)"
"God grants blessing to the sorrowful"
"handsome, beloved"
Similar sound: These names share phonetic patterns with Mister — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Mister.
Rhythm: Mister is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.