Illegitimate – a child born to a couple outside of wedlock.
Immigrant – A person moving TO a new country. (not to be confused with Emigrant)
Indenture – a contract between two parties, where one agrees to serve the other for a time in return for some type of repayment.
Inheritance– Often, but not always the proceeds from a relation’s estate.
In-law – a person related by marriage to a sibling or offspring. IE: Mother-in-law, Father-in-law, Sister-in-law, Brother-in-law.
Internment Camp – See Concentration Camp.
Issue – Offspring or children of a couple. See also Progeny.