Explanation:

- Murdock: Renowned for his work in anthropology and sociology. He introduced the concepts of the family of orientation and the family of procreation.

- Taylor: Known for contributions to cultural anthropology but not for the orientation and procreation family division.

- Radcliff-Brown: A key figure in structural functionalism in anthropology. He focused on social structures rather than family classifications.

- Radcliffe: Often confused with Radcliff-Brown. His contributions are less about family distinctions.