firstborn

The term "firstborn" refers to the eldest child in a family. In many cultures, being the firstborn has significant implications, particularly in inheritance laws, a practice known as primogeniture. This custom historically favored the eldest son and his descendants, aiming to keep estates intact and preserve aristocratic power.123

While primogeniture is the most common, a less frequent practice called ultimogeniture gives preference to the youngest child. The presence of siblings can influence a child's personality development. Firstborns often receive more parental attention and may be more conforming and achievement-oriented than their younger siblings. Sibling rivalry, a common phenomenon, involves competition for parental attention and can shape a child's behavior and interactions.345