Sindel sits next to 4 phonetic neighbors — Sinda, Sinead, and Brendel are the closest matches by sound. Most share Sindel's Old High German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"possibly swift warrior or traveling battle"
"soap, purity"
"Moon goddess; lady of the rainbow; goddess of medicine and weaving"
"a flowing stream, ease"
Similar sound: These names share phonetic patterns with Sindel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Sindel.
Rhythm: Sindel is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.