What to include on the first page
Start with the person rather than a long family history. Full name, date of birth, height, education, occupation, current city and a profile photograph give a reader enough context to decide whether to continue. A clean two-column layout can make a detailed profile fit comfortably on one A4 page without shrinking the type too far.
Family details can follow in a compact section: parents, siblings, family background and native place. Add only facts that the family is comfortable circulating. A full home address, identity numbers and other sensitive information are usually unnecessary in an introductory biodata.