Ailsa sits next to 3 phonetic neighbors — Elsa, Ailish, and Ailis are the closest matches by sound. Most share Ailsa's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"island of Alfsigr (Norse personal name)"
"bright, cheerful"
"poetry, song, fury"
"hilltop town"
"from Troy by the waterfall"
"grace, favor (from Hannah via Anne)"
"to fill to excess, satiate"
"famous warrior"
"energetic, rowdy one"
"elf ruler (alternative folk etymology via Old English)"
"yew tree"
Similar sound: These names share phonetic patterns with Ailsa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse via Scottish Gaelic origins, giving them the same cultural heritage as Ailsa.
Rhythm: Ailsa is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.