Origin: Gaelic. 
Fiachrae was an Irish prince, the son of the high king Eochaid Mugmedón(d.362) by his wife Mongfind, sister of Crimthann […] 
First names and their meaning - Page 10547
Fidalma
Fidalma is not a popular first name. It is more often used as a girl (female) name.
Fidalmo
Fidalmo is not a popular first name. It is more often used as a boy (male) name.
Fidana
Fidana is not a popular first name. It is more often used as a girl (female) name.
Fidda
Origin: Arabic. 
Meaning: Silver. 
Fidda is not a popular first name. It is more often used as a girl (female) name. 
Fidélia
Fidélia is not a popular first name. It is more often used as a girl (female) name.
Fideline
Fideline is not a popular first name. It is more often used as a girl (female) name.
Fidelius
Fidelius is not a popular first name. It is more often used as a boy (male) name.
Fidenzia
Fidenzia is not a popular first name. It is more often used as a girl (female) name.
Fidenzio
Fidenzio is not a popular first name. It is more often used as a boy (male) name.