Rob sits next to 4 phonetic neighbors — Bob, Rod, and Ron are the closest matches by sound. Most share Rob's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright fame"
"beloved, desired"
"hare's meadow, hare clearing"
"green, blooming"
"of noble birth"
"happy, carefree, joyous"
"renowned, called"
"red king"
"son of the horse lord"
"resolute protector, will-helmet"
"Honor"
"princess, noblewoman"
"wealth, fortune, prosperity"
"small, little"
"council friend"
"sun, moon"
Similar sound: These names share phonetic patterns with Rob — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Rob.
Rhythm: Rob is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.