Zillennials, or Zennials, is a social cohort encompassing people born on the cusp of, or during the latter years of the Millennial generation and the early years of Generation Z. Their adjacency between the two generations and limited age set has led to their characterization as a "micro-generation". They are generally the children of younger Baby Boomers and older Generation X. Estimates of the U.S. population in this cohort range from 30 million to 48 million.