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Dative of Possession.
 
373.
 The Dative is used with esse and similar words to denote Possession:
-  
-  est mihi domí
pater (Eccl. iii.33), I have a father at home (there is to me).  
- hominí cum deó similitúdó est
(Legg. i. 25), man has a likeness to God.  
- quibus opés núllae sunt (Sall. Cat. 37),
[those] who have no wealth.  
NOTE:  The Genitive or a Possessive with esse emphasizes the possessor; the
Dative, the fact of possession: as, - liber est meus, the book is MINE (and no one's else); est mihi liber, I
HAVE a book (among other things). 
a. With nómen est, and similar expressions, the
name is often put in the Dative by a kind of apposition with the
person; but the Nominatuve us also common: -  
-  (1) cui
Áfricánó fuit cógnómen
(Liv. xxv. 2), whose (to whom) surname was Africanus.  
- pueró ab inopiá
Egerió inditum nómen (id. i. 34), the name
Egerius was given the boy from his poverty.  
- (2) pueró nómen est
Márcus, the boy's name is Marcus (to the boy is, etc.).  
- cui nomen Arethúsa (Verr. iv. 118), [a fount]
called Arethusa.  
NOTE:  In early Latin the dative is usual; Cicero prefers the
nominative, Livy the dative; Sallust uses the dative only.  In later Latin
the genitive also occurs (cf. § 343. d):  as, - Q. 
Metelló Macedonicí nómen inditum est
(Vell. i. 11), to Quintus Metellus the name of Macedonius was
given. 
b. Désum takes the dative; so occasionally
absum (which regularly has the ablative): -  
-  hóc únum
Caesarí défuit (B. G. iv. 26), this only
was lacking to Caesar.  
- quid huic abesse poterir (De Or.  i.  48), what can be wanting to him? 
 
 
 
