 When presented in this way, the second part of the name is often mistaken by foreigners for a family name.When someone is referred to using only one name, the first name is always used, never the second (because it would be rude to call someone by his or her father's name).Thus, Musa Osman is Mr Musa (or Encik Musa in Malay), and Aisyah Musa is Mrs/Ms/Miss Aisyah (or Puan/Cik Aisyah in Malay).