242738
U 231 was raised in memory of Halfdan by his four children Heðinvé , Eysteinn , Ulfr and Ólafr , while U 232 was raised in memory of Tobbi/Tubbi by his three sons Tosti , Sigfuss and Sigmarr .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None