I have found the pickin's to be slim in the F's.  Has to be short and easy to say quickly before a command or longer but with the ability to shorten it up, ie Chevell = Chevy

So far I have...

Falla

Falk

Faust

Frei

Falcon

Fallon

Faron

I used

Fame

Farrah

Faith

Felix

Fagen

Why do you have to call the dog the registered name at all xD  That's the one thing I've always hated about the german naming system....terribly boring.

That said:

Fanta
Ferrari (Ari or Fera)
Fina
Fuerte
Fierte
Fire
Fall
Freeze
Frisk
Frome
Fine (Fee-nay)
Feeney
Fox
Fromage (Cheese! - just call the dog Aggie xD)
Filly
Filo
Fisher
Fly
Fig
Fineas (Fin or Finny)
Falo
Fara
Faia
Frieda
Friction
Frick
Fracke
Fault
Forman (I love That 70's Show!)
Fes
Fedor
Fortune
Faison
Foray
Finch
Fester
Fling
Fleur
Flam (Heee, Drummer ^_^)
Fray
Frost
Freight
Fright
Farmer (I know dogs named Farmer!)
Fantom
Fiction

I like to make up names for some odd reasons. I stick to the 2 syllable names.

Frocka

Fayza-aribic for "winner" female name

Frieza

Felone

Ficka

Fatu

Fikoo

Firen

Fluka

Fioka

Farica

Freon

 Um.......

Fido?

...........Sorry I couldn't resist.

frick and frack they never left each others side.they were little mix breeds.

Fargo

Finn

Freeway

http://frontandfinish.com/puppyname_f.cfm

Now I have...

Fade

Farouche

Fatal

Faze

Felon

Time for bed. I'll have sweet dreams about puppies...with cute names. ;)

Im partial to Franka, and Fiorie (Pronounced Fee or ee)

Farus
Falko
Fantom
Fero
Fado
Fender
Flori
Furia(girl)
Fima
Fantasia

I'm being biased here, but how about Fiona or Fee for short. It's served me well all these years lol

 My dogs name is Falco. I wanted to name him Elvis, but my Bride won the debate. ;>)

I really like Flea (after the musician,  not the parasite or spelled Flee as in run).  I think Frank is a good strong name for a GSD, but of course I also like Freak, although 2 syllable names can be  better for recalls, etc..  Here is a site with a ton of "F" names:  http://www.seefido.com/html/dog_names_starting_with_f.htm

I have Fireblade and also had Ferarri, Felon, Fagin and Fennel.  K9Ulf has Floh (means Flea).

Margaret N-J

One of Buddy's "extra" names is, Fuddy Winkle... long story!

Fuddy's a great name lol.  Here's a few more...

Finn, Finch, Fergus. Ferdie, Frodo, Fonz, Fez.

Fay, Falla, Flo, Fizz (y), Flitt, Farah.

I really like the name "Freya" for a girl, should I ever acquire another pup this name will be one of the contenders!

For a boy I am somewhat at a loss, I do like the name "Frankie". It's a common name, yet not many dogs have it.
I dont know if any of you watch Futurama or not but I really am diggin' the name "Farnsworth" as well.  "Finnigan" is a nice name too. 

Molly was from an F litter and was named Felice.  I wanted to call her Flash.  Some of her siblings, Figo, Ferdi and Filo

Good luck with picking names,

C

I have a Fury- as in the movie "Fists of Fury"