Forest sits next to 4 phonetic neighbors — Forrest, Foster, and Frost are the closest matches by sound. Most share Forest's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the forest; woodland"
"famous land"
"joy, happiness"
"gray-haired one"
"to rule as monarch"
"wise protector"
"land where rye is grown"
"first zodiac sign, new beginnings"
"ruler's counsel"
"beloved companion"
"renowned warrior"
"one who catches fish"
"leader, commander (variant interpretation)"
"mind, intellect, spirit"
"fifth"
"ever high, the highest"
"high, noble"
"wealth, fortune"
"he who holds firm the good"
"spear of God (from Oscar)"
"farm settlement of Dudda"
Similar sound: These names share phonetic patterns with Forest — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Forest.
Rhythm: Forest is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.