Astrid sits next to 4 phonetic neighbors — Ingrid, Astred, and Astria are the closest matches by sound. Most share Astrid's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"divinely beautiful, god's beloved"
"noble pledge"
"noble and tender"
"white or bright settlement"
"torch, shining light"
"noble kind, of noble birth"
"gracious oath"
"temple servant, attendant at ritual"
"divine spirit, goddess"
"bright, shining light"
"tower, high place"
"grace, favor"
"winged island"
"renowned in battle"
"sorrows"
"lion, lion of God"
"dweller at the hall"
"from the woodland"
"sunny, radiant"
"mighty in battle"
Similar sound: These names share phonetic patterns with Astrid — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Astrid.
Rhythm: Astrid is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.