Mo sits next to 4 phonetic neighbors — Joe, Bo, and Row are the closest matches by sound. Most share Mo's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the praised one"
"born of fire"
"Welsh form of Maximus"
"counsel meadow"
"son of William"
"from the fortress town"
"of noble kind"
"God ruler; one who rules with divine authority"
"village at the ford; river-crossing settlement"
"God is gracious"
"narrow channel, strait"
Similar sound: These names share phonetic patterns with Mo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Mo.
Rhythm: Mo is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.