Ember sits next to 3 phonetic neighbors — Amber, Emberly, and Kimber are the closest matches by sound. Most share Ember's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ember, smoldering remnant"
"goddess of the rainbow, messenger of the gods"
"bay laurel"
"royal clearing"
"blooming, green shoot"
"strong, manly"
"God will increase"
"descendant of the young warrior"
"descendant of Raghallach"
"of the Julian family (Gens Julia)"
"my father is joyful"
"work-power, industrious strength"
"An English surname turned first name; popularized as a girl's name ..."
"adornment, ornament"
"state of peaceful calm"
"noble natured"
"royal child of heaven"
"silver"
Similar sound: These names share phonetic patterns with Ember — 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 Ember.
Rhythm: Ember is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.