The spelling of the name "Thilda" is based on the phonetic pronunciation. It can be transcribed using the International Phonetic Alphabet (IPA) as /ˈθɪldə/. The first sound, /θ/, represents the "th" sound as in "thin". The second sound, /ɪ/, represents the short vowel "i" sound. The third sound, /l/, represents the "l" sound. The fourth sound, /d/, represents the "d" sound. The final sound, /ə/, represents the schwa sound, which is a neutral vowel sound. Overall, the spelling of "Thilda" accurately reflects its pronunciation.
The name "Thilda" is of Scandinavian origin. It is derived from the Old Norse name "Þyriðr", which consists of the elements "þūr", meaning "Thor" (the Norse god of thunder) and "ríða", meaning "to ride". The name Thilda, therefore, can be interpreted to mean "rider of Thor". It is worth noting that Thilda is also a variant of the name "Mathilda" or "Matilda", which has Germanic roots meaning "strength in battle".