Are there any races that are valid as a familiar, but can also take class levels?

[enderlord99]

To clarify, the class levels don't necessarily go to the familiars themselves; I just want a kingdom composed almost entirely of wizards and their familiars, that is also mostly unispecies. Fluff-wise, the kingdom's culture considers "familiar" to be somewhere between "lab assistant" and "spourse." Mechanically, they will be normal familiars.

EDIT: Homebrew is acceptable, but not preferred.

[Aegis013]

If Improved Familiars are an option, there's tons.

Imps, Elementals, Psuedodragons, etc.

If not, then not to my knowledge. All of the familiars have Int 2.

[Soranar]

a muckdweller can both be a player character and a familiar

[enderlord99]

a muckdweller can both be a player character and a familiar

What book is the muckdweller from?

[Snowbluff]

Serpent Kingdoms.

Also, Beguilers. Shining South, IIRC.

[Werephilosopher]

Serpent Kingdoms

Aw, swordsage'd

[Vaz]

Anything with Int higher than 3. However, with the exception of a deities ability to make anything it desires (including the PC's) to be its familiar, there is nothing allowing a familiar from having Class Levels.

A Beguiler is a Cohort only race, and I'm not sure if it's available as a familiar.

[gorfnab]

A Beguiler is a Cohort only race, and I'm not sure if it's available as a familiar.
It's available as an Improved Familiar. I played a Beguiler Beguiler as a PC, it was awesome.

[Snowbluff]

I forgot about Pseudodragon.

[Coidzor]

Mephits have Cohort only LA & are Improved Familiars, IIRC.

[Gavinfoxx]

It's available as an Improved Familiar. I played a Beguiler Beguiler as a PC, it was awesome.

Maan I wanna do that one of these days...

[Red Fel]

Nobody mentioned Tressym? It's a tiny, flying, talking cat. How do you not want to play one of those?

Note that Tressym doesn't actually have race stats, but they can be extrapolated.

[Prince Raven]

Tibbits are descended from Wizard familiars.

[Vaz]

It's available as an Improved Familiar. I played a Beguiler Beguiler as a PC, it was awesome.

Max Charisma, Bluff, Diplomacy, Gather Information etc so it's a Beguiling Beguiler Beguiler?

[Cowardly Griffo]

Max Charisma, Bluff, Diplomacy, Gather Information etc so it's a Beguiling Beguiler Beguiler?Okay, now give it a flat-top haircut. (https://www.youtube.com/watch?v=Iof5pRAIZmw) And maybe a bard level or two. Bard goes with everything! *rimshot*

[Coidzor]

Okay, now give it a flat-top haircut. (https://www.youtube.com/watch?v=Iof5pRAIZmw) And maybe a bard level or two. Bard goes with everything! *rimshot*

Remember to take the Flaw: IT'S A MEDICAL CONDITION! (http://thepunchlineismachismo.com/archives/comic/ive-been-waiting-to-draw-this-for-ages) too.

[Inevitability]

If you awaken it: almost everything. Does that count?