There are four cases in Icelandic. The first case in the declension table is known as the “nominative case”.[a] It is the default case for a word and it shows that the word is doing something — it is the main subject of the sentence.
The helper words you use to force a word into the first case is „hér er“ (“here is”).
Verbs that cause the first case include „að vera“ (to be) and „að heita“ (to be called).