Solar sits next to 3 phonetic neighbors — Solaris, Sol, and Solar are the closest matches by sound. Most share Solar's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the sun, relating to the sun"
"black-haired, dark one"
"virtuous, without wickedness"
"well-pleasing, excellent"
"God strengthens, strength of God"
"broad clearing, wide meadow"
"that which is believed"
"from the Antonius clan"
"edge of a shield"
"of the golden family (Aurelii)"
"spear wood (ash was used for spears)"
"triangular wall end, architectural peak"
"valley, dale"
"healer (if from Jason)"
"small holy man"
"army protector"
"illumination, radiance"
"ash tree farm, settlement by ash trees"
"renowned king"
"chromium element"
Similar sound: These names share phonetic patterns with Solar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Solar.
Rhythm: Solar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.