Edgar sits next to 4 phonetic neighbors — Edward, Edwin, and Edgard are the closest matches by sound. Most share Edgar's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rich spear, lucky warrior"
"to tame, to subdue"
"military commander, war leader"
"Botolph's town, market town"
"from the island of Rhodes"
"brave with a spear"
"spear strength, brave with the spear"
"dark one, black"
"lion man"
"elevated, supreme"
"park, game preserve"
"possessing goodness"
"young creature, cub"
"dark-skinned, Moorish"
"strong and healthy"
"settlement near the coal"
"little red one (from red hair)"
"fallow land, uncultivated land"
"frisky, energetic youth"
"son of Cadan"
Similar sound: These names share phonetic patterns with Edgar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Edgar.
Rhythm: Edgar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.