remainderman

Short definition from Wiktionary

Noun

1. 1
   A person entitled to receive a remainder interest in any property.
2. 2
   A person entitled to the assets of a trust at the end of some specified period or after some event. For instance a man's will might put his assets into a trust with the income to go to his wife until she dies (being a life interest), at which time the capital (remainder interest) goes to their children. The children are remaindermen.