Simple RAW for 3.5: 38 pages, and I still don't know how to play D&D

[Vaern]

A2

No. The obtain familiar feat allows you to summon a familiar in the same way as a sorcerer or wizard, and refers directly to the rules regarding familiars in the PHB. Having multiple classes that allow you to summon a familiar does not entitle you to summon multiple familiars or to summon familiars more frequently. If multiple classes would grant you a familiar they simply stack to determine how powerful your familiar is. The only benefit a sorcerer or wizard gains from the obtain familiar feat is that it uses your levels from all arcane caster classes to determine your familiar's strength, which can be useful if you plan on either multiclassing into another arcane base class that doesn't gain a familiar of its own, or taking an arcane prestige class that does not advance your familiar (which is most prestige classes).