The spelling of the name "Andrejus" is based on the Lithuanian pronunciation of the name Andrew. Using the International Phonetic Alphabet (IPA), the pronunciation is: /ɑnˈdreɪjʊs/. The first syllable is pronounced as "ahn" with a soft "n" sound. The second syllable is pronounced as "dray" with a long "a" sound. The third syllable is pronounced as "yus" with a short "u" sound. When written in English, "Andrejus" is a phonetic representation of the Lithuanian pronunciation of the name.
The word "Andrejus" is of Lithuanian origin. It is a variant of the name "Andrius" or "Andrius", which itself is derived from the Greek name "Andreas" meaning "man" or "manly". "Andrejus" is a masculine given name in Lithuania and other parts of Eastern Europe.