Roger sits next to 3 phonetic neighbors — Rodger, Rory, and Roland are the closest matches by sound. Most share Roger's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"famous spear"
"fifth"
"of the forest; woodland"
"noble, bright"
"vigor and power"
"visitor, pilgrim"
"brown, dark-complexioned"
"stone clearing, rocky glade"
"supplanter, one who follows"
"son of the cloud"
"wild rose, thorny shrub"
"beloved companion"
"light, luminous"
"lucky, perfect"
"counsel + wolf (rád + ulfr)"
"healer (if derived from Jason/Kason)"
"God will increase, God will add"
"the cleansing one"
"of the Caspian Sea"
"he who holds firm the good"
"one who brings news"
Similar sound: These names share phonetic patterns with Roger — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Roger.
Rhythm: Roger is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.