Is the study of ancestral connections and the tracing of lines from one individual to another, through ancestral ties. The same concept has been transferred over into perfumery, with an interest in the study of different fragrances and their connections to other fragrances though lines of descent being on the rise in recent years.

Genealogy, in perfumery, is the practice of drawing connections from one fragrance to another, to decipher the origins of fragrances. The ultimate goal is to map the entire genealogy of all fragrances, and to ultimately uncover the connections between the fragrances and their respective families, wherever they lie. It is used extensively in perfumery to establish when and how a fragrance was created, and through what ancestors it was procured. It also helps perfumers gain insight into where a particular fragrance has received most of its qualities from, and where its primary influences owe their presence to. It is also used to properly decide what family any given fragrance should be placed into, as well as, to define families in their entirety.

The general idea behind genealogy in a practical sense, is to gain the benefits of a simplification of fragrance categorization. Genealogy uses 12 families of olfactory to achieve this goal, with the idea being that any fragrance can be placed into any given family, or any combination of families, without any fragrance being left in limbo — unable to be defined. The 12 olfactory families of genealogy include: green, floral/fresh, dry floral (herb), floral, aldehydic floral, aldehydic-woody-floral-powdery, fresh aldehydic mossy, aldehydic-mossy-animalic, mossy-fruity, oriental, tobacco-leather, and fougère.