The spelling of the name "Gilberta" can be explained using the International Phonetic Alphabet (IPA). The first sound is a voiced velar stop /g/ followed by the long vowel sound /i:/ and the voiced alveolar fricative /z/. The "b" in "Gilberta" is pronounced as a voiced bilabial stop /b/. This is followed by the neutral vowel sound /ə/ and the voiceless alveolar fricative /t/. Finally, the name ends with the sound /ə/ again. In summary, "Gilberta" is spelled as /gɪlˈbɜːtzə/ in IPA.
The name "Gilberta" has a Germanic origin. It is derived from the Germanic name "Gilbert", which is a combination of the elements "gīs" meaning "spear" and "beraht" meaning "bright, famous". Therefore, "Gilberta" can be understood as a feminine form of "Gilbert".