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"
"to be of worth, valor"
"beautiful, handsome"
"well-spoken, of good repute"
"river mouth, coastal inlet"
"safe harbor, refuge"
"from India, land of the Indus"
"horn (from Cornelia)"
"divine power (short for Oswald)"
"lake from Scotland"
"image, likeness"
"God is gracious"
"song thrush (bird)"
"free, from the lake"
"noble woman"
"free person (feminine of Charles/Karl)"
"noble, nobility"
"famous warrior"
"rival, industrious"
"of Mars, the war god"
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.