kinship terms - Difference between "second cousin" and "first cousin once removed"

25
2014-04
  • Inquisitive

    Possible Duplicate:
    Is there an accepted rule for naming all of our various distant relatives (Kinship Terms)?

    What is the difference between second cousin and first cousin once removed? Is "[ordinal] cousin once removed" generally used in English?

  • Answers
  • Robusto

    "Removed" here describes vertical as opposed to lateral relationship on the tree of life.

    removed adj
    2. (Law) (postpositive) separated by a degree of descent or kinship the child of a person's first cousin is his first cousin once removed


  • Related Question

    names - Is there an accepted rule for naming all of our various distant relatives (Kinship Terms)?
  • Jon Hadley

    I’m going to the christening of my Cousin’s first son soon. What is the proper name for his relation to me?

    2nd Nephew? Nephew once removed? Nothing?

    Looking at the overall picture, whats the accepted rule for the naming of all of our various relations?


  • Related Answers
  • Kosmonaut

    Kinship chart

    Your cousin's first son is your first cousin once removed. It is quite confusing!

  • Mr. Shiny and New 安宇

    It's very easy to determine the relationship in English.

    First, find your common ancestor. Siblings have the same father, cousins have the same grandfather, etc.

    • Same grandfather means First cousin.
    • Same great-grandfather means second cousin.
    • Same great-great-grandfather means third cousin.

    If you are not in the same generation, pick the shortest one, then the generation distance is how many times removed.

    • Your cousin's child is your first cousin, once-removed.
    • That person's child is your first cousin, twice removed.

    The labels work the same in both directions so "first cousin, once removed" identifies the relationship to the speaker irrespective of whether that person is in the younger generation or not.

  • KitFox

    My brother is into genealogy, and he described for me a simple way to remember these relationships.

    1. Going up-generation uses ordinals. So your cousin is your first cousin. Your parent's cousins are your second cousins. Your grandparent's cousins are your third cousins.

    2. Going down-generation use removes. So your first cousin's child is your first cousin once-removed. Your third cousin's grandchild is your third cousin twice-removed.

    This contradicts Mr. Shiny's answer though, because the relationships are not symmetrical. To my second cousin (my father's cousin), I am a first cousin once-removed.