Glender sits next to 4 phonetic neighbors — Glenda, Glennie, and Gender are the closest matches by sound. Most share Glender's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"valley, mountain glen"
"lily, rose"
"elf counsel (via Alfrid)"
"shield-wolf, defender"
"noble one, of aristocratic birth"
"little red one; graceful river"
"joyful round song"
"Elaboration of Linda, meaning beautiful"
"gracious, favored"
"Christ-carrier"
"God is gracious"
"Reborn; born again; variant of Renee"
"God will increase; from a wooded valley"
"little joy, dear song"
"lake, pool"
"lady, mistress of the house"
Similar sound: These names share phonetic patterns with Glender — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Glender.
Rhythm: Glender is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.