Spencer sits next to 4 phonetic neighbors — Spenser, Spencer, and Piper are the closest matches by sound. Most share Spencer's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"steward, dispenser of provisions"
"clear ice, transparent gem"
"vigilant, watchful"
"well-spoken of"
"light, bright, shining torch"
"flirtatious, charming"
"pure, holy, chaste"
"God is abundance"
"maiden, girl"
"blood red, vibrant red"
"estate of the fifth son"
"beloved, little Mary"
"robin bird, red-breasted songbird"
"power of the household"
"favor, blessedness"
"white, fair, holy"
"God is gracious"
"black gemstone with white bands"
"my God is the Lord (via Hebrew Elijah)"
"of the Claudian clan"
"curly-haired, descendant of Caiside"
Similar sound: These names share phonetic patterns with Spencer — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Spencer.
Rhythm: Spencer is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.