What are the names of all Doctor Who companions?

Here are the names of all Doctor's Who companions:

1. Ian Chesterton

2. Barbara Wright

3. Susan Foreman

4. Vicki Pallister

5. Steven Taylor

6. Katarina

7. Sara Kingdom

8. Dodo Chaplet

9. Polly Wright

10. Ben Jackson

11. Jamie McCrimmon

12. Victoria Waterfield

13. Zoe Heriot

14. Liz Shaw

15. Jo Grant

16. Sarah Jane Smith

17. Harry Sullivan

18. Leela

19. K-9

20. Romana I

21. Romana II

22. Adric

23. Nyssa

24. Tegan Jovanka

25. Turlough

26. Peri Brown

27. Ace

28. Mel Bush

29. Rose Tyler

30. Mickey Smith

31. Donna Noble

32. Martha Jones

33. Jack Harkness

34. Amy Pond

35. Rory Williams

36. River Song

37. Clara Oswald

38. Bill Potts

39. Nardole

40. Yasmin Khan

41. Ryan Sinclair

42. Graham O'Brien