Éomund:

Éomund was the husband of Théodwyn, sister to King Théoden. His two children were Éomer and Éowyn. Known for his determination in fighting orcs, he was slain on one of those ventures in the year 3002 of the Third Age. At the time, Éomund had been in charge of the East Marches of Rohan as the Chief Marshall of the Mark. At one point, Aragorn says that he had met Eomund while he was in the service of Rohan. This would likely have been in the three year period between 2957 and 2980 of the third Age.