Vampire Lore Feat 1
Source Pathfinder Advanced Player's Guide
You were raised by your vampiric parent, or you've invested substantial time and energy researching the secrets of your undead progenitors. You gain the trained proficiency rank in Religion and Society. If you would automatically become trained in one of those skills (from your background or class, for example), you instead become trained in a skill of your choice. You also become trained in Vampire Lore.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
DhampirA creature with this trait is a member of the dhampir ancestry. These humanoids are the mortal offspring of vampires and members of other ancestries.