Boys name : Mackenzie Rhys OR Mackenzie William?

I like Mackenzie Rhys. It's more unique and sounds better. Just a note: the name Lilia Penelope sounds off because of the syllables and vowels. Try instead a one or three syllable second name with Lilia or keep Penelope and change Lilia to a three or four syllable first name. Also, have only one name end with a vowel sound and the other with a constant sound. Hope this helped.