In this chapter, the following concepts are explained:
- strong masculine declension
- strong feminine declension
- strong neuter declension
- strong r-stem declension
- strong nd-stem declension
- weak masculine declension
- weak feminine declension
- weak neuter declension
Labial mutation (aka. u-umlaut) is marked by an L before the ending.
Front mutation (aka. i-umlaut) is marked by an F before the ending.
Strong masculine declension
a-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | -r | -ar | 
| genitive | -s, -ar | -a | 
| dative | -i | L -um | 
| accusative | -∅ | -a | 
For the genitive singular, some nouns had -s, others had -ar, still others had both.
ja-stem nouns
| long stem | short stem | |||
|---|---|---|---|---|
| case | singular | plural | singular | plural | 
| nominative | -ir | -ar | -r | -jar | 
| genitive | -is | -a | -s | -ja | 
| dative | -i | L -um | -i | L -jum | 
| accusative | -i | -a | -∅ | -ja | 
Masculine short stem are rare. The only ones are niðr, herr and beðr.
Long stems have i instead of j unless followed by back vowels (here a, u). j disappears anyways after a long stem, unless preceded by g or k.
wa-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -r | L -var | 
| genitive | L -s, -var | L -va | 
| dative | L -vi | L -um | 
| accusative | L -∅ | L -va | 
i-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | -r | -ir | 
| genitive | -s, -ar | -a | 
| dative | -∅, -i | L -um | 
| accusative | -∅ | -i | 
u-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -r | F -ir | 
| genitive | -ar | -a | 
| dative | F -i | L -um | 
| accusative | L -∅ | L -u | 
Consonant stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | -r | F -r | 
| genitive | -s, -ar | -a | 
| dative | (F) -i, -∅ | L -um | 
| accusative | -∅ | F -r | 
Strong feminine declension
ō-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -∅ | -ar | 
| genitive | -ar | -a | 
| dative | L -∅, -u | L -um | 
| accusative | L -∅ | -ar | 
jō-stem nouns
| long stem | short stem | |||
|---|---|---|---|---|
| case | singular | plural | singular | plural | 
| nominative | L -r | -ar | L -∅ | -jar | 
| genitive | -ar | -a | -jar | -ja | 
| dative | L -i | L -um | L -∅, -ju | L -jum | 
| accusative | L -i | -ar | L -∅ | -jar | 
wō-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -∅ | L -var | 
| genitive | L -var | L -va | 
| dative | L -∅, -u | L -um | 
| accusative | L -∅ | L -var | 
i-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -∅, -r | -ir | 
| genitive | -ar | -a | 
| dative | L -∅, -u | L -um | 
| accusative | L -∅ | -ir | 
Consonant stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -∅ | F -r | 
| genitive | -ar, (F -r) | -a | 
| dative | L -∅ | L -um | 
| accusative | L -∅ | F -r | 
Strong neuter declension
a-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | -∅ | L -∅ | 
| genitive | -s, -ar | -a | 
| dative | -i | L -um | 
| accusative | -∅ | L -∅ | 
ja-stem nouns
| long stem | short stem | |||
|---|---|---|---|---|
| case | singular | plural | singular | plural | 
| nominative | -i | L -i | -∅ | L -∅ | 
| genitive | -is | -a | -s | -ja | 
| dative | -i | L -um | -i | L -jum | 
| accusative | -i | L -i | -∅ | L -∅ | 
Long stems have i instead of j unless followed by back vowels (here a, u). j disappears anyways after a long stem, unless preceded by g or k.
wa-stem nouns
| case | singular | plural | 
|---|---|---|
| nominative | L -∅ | L -∅ | 
| genitive | L -s, -var | L -va | 
| dative | L -vi | L -um | 
| accusative | L -∅ | L -∅ | 
Strong r-stem declension
| case | singular | plural | 
|---|---|---|
| nominative | -ir | F -r | 
| genitive | L -ur | F -ra | 
| dative | L -ur | F -rum | 
| accusative | L -ur | F -r | 
r-stem nouns are those of family members and relationships. They are faðir, móðir, bróðir, systir and dóttir. faðir has an alternative genitive singular feðr.
Strong nd-stem declension
| case | singular | plural | 
|---|---|---|
| nominative | -i | F -r | 
| genitive | -a | -a | 
| dative | -a | L -um | 
| accusative | -a | F -r | 
nd-stem nouns were originally present participles used substantively, like English he witnessed the killing of his mother.
Weak masculine declension
an-stem masculine nouns
| case | singular | plural | 
|---|---|---|
| nominative | -i | -ar | 
| genitive | -a | -a | 
| dative | -a | L -um | 
| accusative | -a | -a | 
jan-stem masculine nouns
| case | singular | plural | 
|---|---|---|
| nominative | -i | -jar | 
| genitive | -ja | -ja | 
| dative | -ja | L -jum | 
| accusative | -ja | -ja | 
Weak feminine declension
ōn-stem feminine nouns
| case | singular | plural | 
|---|---|---|
| nominative | -a | L -ur | 
| genitive | L -u | -na | 
| dative | L -u | L -um | 
| accusative | L -u | L -ur | 
jōn-stem feminine nouns
| case | singular | plural | 
|---|---|---|
| nominative | -ja | L -jur | 
| genitive | L -ju | -na | 
| dative | L -ju | L -jum | 
| accusative | L -ju | L -jur | 
īn-stem feminine nouns
| case | singular | plural | 
|---|---|---|
| nominative | -i | -ar | 
| genitive | -i | -a | 
| dative | -i | L -um | 
| accusative | -i | -ar | 
Weak neuter declension
an-stem neuter nouns
| case | singular | plural | 
|---|---|---|
| nominative | -a | L -u | 
| genitive | -a | -na | 
| dative | -a | L -um | 
| accusative | -a | L -u | 
jan-stem neuter nouns
| case | singular | plural | 
|---|---|---|
| nominative | -ja | L -ju | 
| genitive | -ja | -na | 
| dative | -ja | L -jum | 
| accusative | -ja | L -ju |