The spelling of the name "Ragnilda" can be explained through its IPA transcription /ræɡˈnɪldə/. The first syllable starts with the "r" sound /r/ followed by the short "a" vowel sound /æ/. The second syllable begins with the voiced velar fricative sound /ɡ/ followed by the short "i" vowel sound /ɪ/. The final syllable starts with the alveolar lateral approximant sound /l/ followed by the schwa sound /ə/. Therefore, the correct spelling for the name is R-a-g-n-i-l-d-a.