Philippa sits next to 4 phonetic neighbors — Phillipa, Filipa, and Felipa are the closest matches by sound. Most share Philippa's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lover of horses, friend to horses"
"golden one"
"truth"
"light, bringer of light"
"strong and hardy"
"wise messenger, prophet bird"
"Yahweh is merciful"
"whole, universal"
"hidden, possibly myrtle plant"
"independent"
"of the lake, water"
"reborn clearing"
"daughter of the sun"
"tribe woman, woman of the race"
"of the air"
"to be of worth, valor"
"noble birth, well-born class"
"gracious, dear, beloved (via Slavic mila)"
"angels, of the angels, divine messengers"
"light and warmth from the sun"
"graceful flower"
Similar sound: These names share phonetic patterns with Philippa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Philippa.
Rhythm: Philippa is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.