Gleda sits next to 4 phonetic neighbors — Freda, Leda, and Gleda are the closest matches by sound. Most share Gleda's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to gladden, make joyful"
"island of Alfsigr (Norse personal name)"
"God is gracious"
"renowned fighter"
"foot soldier near the lake"
"grace, favor (from Hannah via Anne)"
"to fill to excess, satiate"
"feminine elaboration of Odin (Norse chief god)"
"energetic, rowdy one"
"peaceful ruler"
"hilltop town"
Similar sound: These names share phonetic patterns with Gleda — 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 Gleda.
Rhythm: Gleda is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.