If the foregoing is substantially correct, much in the Hroar-Helgi story is accounted for, besides some striking differences between the two versions. But it is possible to account for more. We have seen how the Siward story exerted marked influence on the story about Bothvar Bjarki; hence, we might expect it to have exerted some influence on the Hroar-Helgi story, which is also a part of the _Hrólfssaga_. And this it has done. Siward was historically closely associated with the events of the Macbeth story; but the Macbeth story is of a type that, in one noteworthy particular at least, resembles the Hroar-Helgi story more than do any of the stories thus far considered, and that is in the fact that Duncan has two sons, who flee when their father is murdered. In the Macbeth story, as in the Hamlet story, it may be said that we have not, under a strict interpretation of the term, an instance of the "exile-return" type of story; but Hamlet goes to England and immediately upon his return avenges his father's murder, and, still nearer the type, Malcolm and Donaldbane flee and Malcolm returns and avenges his father's murder. But the matter of type is, in this connection, unessential. There is no doubt that the Hamlet story exerted an influence on the Hroar-Helgi story, nor can there be any doubt that the Macbeth story did the same. First, attention is called to the fact that in the _Hrólfssaga_ Siward himself is retained in the story under the name of Sævil.[150] In Saxo's version of the story about Hroar and Helgi, he is called Siward, but there his proper relationship to the other characters is obscured. Siward was related to Duncan by marriage, some versions, Holinshed's for instance, having it that Duncan was married to Siward's daughter;[151] similarly, Sævil was married to Halfdan's daughter. Siward aided Duncan's sons (Donaldbane, however, not being present to take part in the expedition against Macbeth); similarly, Sævil aided Halfdan's sons, not by an armed expedition against Frothi, the usurper, but proceeding against him in such manner as the plot of the story permits. It is said of Donaldbane, that he fled to Ireland "where he was tenderlie cherished by the king of that land";[152] similarly, Hroar went to Northumberland, where he received a hearty welcome and later married King Northri's daughter, Ögn.[153] Siward was first an earl in Denmark; similarly, Sævil was an earl in Denmark. Sævil did not, however, become Earl of Northumberland, as Siward did; but Hroar took his place, so to speak, in this respect, and, as Siward had done, married the earl's (king's) daughter[154] and became King of Northumberland.