The spelling of the word "Walberg" can be explained using the International Phonetic Alphabet (IPA). The first syllable "Wal" is pronounced as /wɔːl/, with a rounded vowel sound and a silent "r". The second syllable "berg" is pronounced as /bɜːrɡ/, with a schwa sound in the first vowel and a rolled "r" sound. In English, "Walberg" is a surname and is commonly pronounced as "Wahlberg". However, the correct pronunciation of the word should follow the IPA transcription.
There is no specific etymology for the word Walberg as it is a surname. Surnames are commonly derived from various sources such as occupation, geographic location, personal names, or other distinguishing characteristics. It is possible that Walberg originated as a combination of the Germanic elements walh or walo meaning foreigner or stranger and berg meaning mountain or hill. However, without more specific information, it is difficult to ascertain the exact origin and meaning of the surname Walberg.