Stirling sits next to 3 phonetic neighbors — Sterling, Starling, and Stuart are the closest matches by sound. Most share Stirling's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of high quality, excellent"
"son of Uaid (Walter)"
"God saves"
"ridge meadow"
"fiery one"
"modern creative name with nature roots"
"wise protector, counselor-guardian"
"of legend, mythic, extraordinary"
"ruler, sovereign (Greek/Latin influence on Tyrant root)"
"little poet"
"swift as a deer"
"holder of the heel"
"Invented modern form"
"fair warrior, white hero"
"thankful"
"independent, unbranded — named after Samuel Maverick whose cattle w..."
"the heavenly one, royal (via Kalani)"
"of the sea"
"son of Iain (John)"
Similar sound: These names share phonetic patterns with Stirling — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish place name origins, giving them the same cultural heritage as Stirling.
Rhythm: Stirling is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.