The correct spelling of the name "Granvill" is a matter of some debate. Some people spell it with one "l", while others use two. The IPA phonetic transcription for this word would be [ɡrænvɪl] or [ɡrænvɪl]. This reflects the fact that the first syllable is pronounced with a short "a" sound, while the second syllable uses a short "i". While it's important to spell names correctly, ultimately, what matters most is how the person themselves choose to spell their own name.