It's All Relative

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Across
  1. 3. male parent
  2. 4. older female sibling
  3. 7. adult male person
  4. 10. younger female sibling
  5. 13. the father of one's mother
  6. 15. older male sibling
  7. 16. female child from birth to adulthood
  8. 17. an extremely young child
  9. 19. the mother of one's mother
Down
  1. 1. male child from birth to adulthood
  2. 2. adult female person
  3. 5. the brother of one's mother
  4. 6. female offspring
  5. 8. the mother of one's father
  6. 9. younger male sibling
  7. 11. the parent of one's grandparent
  8. 12. female parent
  9. 14. the father of one's father
  10. 15. the sister of one's father
  11. 18. male offspring