Lyle sits next to 4 phonetic neighbors — Kyle, Miles, and Wylie are the closest matches by sound. Most share Lyle's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the island, island dweller"
"genuine, authentic, honest"
"at the holly trees"
"narrow water"
"God is gracious"
"victory of the people"
"God supports, Yahweh supports"
"heart brave"
"from the Rodney estate"
"tile maker, one who tiles"
"God-like"
"slender, narrow"
"great forest, eagle valley"
"from Scotland, a Scotsman"
"noble lord"
"queen's settlement"
"throne of the eye (possible etymology)"
"shepherd, one who tends sheep"
"his excellence, his preeminence"
"of Nîmes, sturdy woven cloth"
Similar sound: These names share phonetic patterns with Lyle — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Norman French origins, giving them the same cultural heritage as Lyle.
Rhythm: Lyle is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.