On the island of Ădey there has been a large farmstead from the earliest times, as its bird resources are significant. Twenty-four kinds of birds have laid eggs there. Ari, the sheriff at Ígur, and his men surrounded eighteen Spanish sailors at Ădey whose ship had run aground, and killed them all. The Spaniards had been accused of stealing animals and a boat at Dynjandi, and according to a king's decree could be killed on sight. Most of them were stoned to death at the so-called Gulanef at Ădey, others were shot at Sandeyri and in the channel just offshore.
In the latter part of the 19th century the marksman Ot˙el Vagnsson(1834-1901) was charged by the sheriff at Ădey with poaching ducks. Rˇsinkar ┴rnason, farmer at Ădey, brought the accusation, and Ot˙el was forced to pay a large fine. When the judgement had been made, Rˇsinkar said to Ot˙el, "Shoot now, you devil, if you dare." Ot˙el didn't hesitate, and fired, killing seven birds at once. Ot˙el got away with this action, as the sheriff was a witness that Rˇsinkar had indeed asked Ot˙el to shoot.
Twenty people were registered as living at Ădey in 1703, at which time there were two farms there. People believe a prayer house had existed on the island in the old days. The siblings ┴sgeir Gudmundsson, Halldˇr Gudmundsson and SigrÝdur Gudmundsdˇttir resided at Ădey around 1930 and for many years after that. A large, well-equipped house was built here in 1863-64, which still stands today, mostly unchanged, although an addition has been made to it.
The family sold the land in 1961, at which time Helgi Thˇrarinsson from Lßtrar in Mjˇifj÷rdur, and Gudr˙n Lßrusdˇttir, the daughter of Gudjˇna Gudmundsdˇttir from Ădey, moved in.
In Jardabˇk (The Book of Farms) from 1703 it is said that people believed a farm once stood on the so-called Nordurt˙n at Ădey. There could be seen the remains of old walls. A fence in a similar shape led west from this field, which was also considered to be the remains of a former settlement. To the north of the dwelling quarters at Ădey is the Mylluhˇll hill. There was a grain mill there which blew away in 1941. On the southernmost point of Ădey is Klettshˇll hill, where a lighthouse was built in 1949. At the north part of the island is Kaplanes point, where a pier was built in 1971. From there it is about a kilometre to the farm. In the channel between Ădey and the mainland is Dj˙phˇlmur which was used for haymaking in the old days. The so-called Bergsel can be found beyond Hßvardsstadir; the Ădey farmers used this to house their animals in the summer for a long time. In Jardabˇk it is called Mßnaberg, and says that people lived there in the old days, although little sign could be seen of that in 1703.
The house Jˇnasarh˙s was built at Ădey in 1878 and still stands, largely unchanged. This house was initially built for salting at Reykjanes just before 1790. There is a gournd floor and attic with eaves. Rˇsinkar ┴rnason bought the house after it had been unused for a long time, and set it up on Ădey when his family suddenly became homeless. Jˇnas Jˇnasson and ElÝsabet Gudmundsdˇttir lived in the house until 1936 when they moved to ReykjavÝk. The house has been used for storage since that time.