Explanation:

- Kingsley Davis defined the Hindu joint family as “a group constituted of known ancestors, adopted sons and relatives related to these sons through marriage.”

- Henry Maine is well-known for his study “Ancient Law” and his analysis of the joint family, but he did not give the specific quoted definition.

- MacIver focused on family structures, but not specifically on the Hindu joint family in these terms.

- H.M. Johnson wrote on sociology and family but did not precisely define the joint family as mentioned.

Correct Answer:

Option:2 Kingsley Davis