In human context, a family (from Latin: familiar) is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children. Extended from the human "family unit" by biological-cultural affinity, marriage, economy, culture, tradition, honor, and friendship are concepts of family that are physical and metaphorical, or that grow increasingly inclusive extending to community, village, city, region, nationhood, global village and humanism. A family group consisting of a father, mother and their children is called a nuclear family. This term can be contrasted with an extended family.

There are also concepts of family that break with tradition within particular societies, or those that are transplanted via migration to flourish or else cease within their new societies. As a unit of socialization and a basic institution key to the structure of society[citation needed][clarification needed], the family is the object of analysis for sociologists of the family. Genealogy is a field which aims to trace family lineages through history. In science, the term "family" has come to be used as a means to classify groups of objects as being closely and exclusively related. In the study of animals it has been found that many species form groups that have similarities to human "family"—often called "packs."

A crest is a component of an heraldic display, so called because it stands on top of a helmet, as the crest of a jay stands on the bird's head.

Objects frequently borne as crests include animals, especially lions, normally showing only the fore half; human figures, likewise often from the waist up; hands or arms holding weapons; bird's wings. In Germany and nearby countries, the crest often repeats the liveries in the form of a tall hat, a fan of plumes in alternating tinctures, or a pair of curving horns. The horns may have a hole in the tip to hold a cluster of plumes or flowers, and because of this have been imported to English heraldry at least once as elephant's trunks.