If the chart is confusing, maybe this will help.
If someone is your first cousin, then his or her child is your first cousin once removed. (Once removed means one generation level different from you.) All your regular cousins (first, second, etc.) are at the same generation level as yourself. Those at different levels are “removed.” If someone is YOUR first cousin once removed, then you are HIS or HER first cousin once removed also. Your second cousin once removed is the child of your second cousin. Your first cousin twice removed is the child of your first cousin once removed (i.e. the grandchild of your first cousin). Your second cousin twice removed is the child of your second cousin once removed (i.e. the grandchild of your second cousin).
REMOVED COUSINS: If two people are some type of cousins, but they are at different generation levels, then here is the way to compute their relationship. Count how many generation levels they are apart. This is the number they are “removed.”
Start with the one at the highest generation level (the older level) and count how many generations up you must go to find the brothers or sisters that are the ancestors of these cousins. This is the “FIRST” or “SECOND” or “THIRD” part of the cousin relationship.
Source: Ancestery
@IheartMypuppy and @filmfann Your parents’ cousins are your 1st cousins once removed. Their children are your 2nd cousins.
@Mimishu1995 That’s interesting. Maybe the labels are different in Asia. I just assumed that they are the same everywhere.
@JLeslie Yeah, it really confusing, because people tend to think that their parents’ cousins would be their second cousins.
Here’s how I look at it so that it makes sense.
* Your cousins = 1st cousins
* Your parents’ cousins = 1st cousins once removed (since it’s a different generation)
* Your grandparents’ cousins = 1st cousins twice removed (since it’s 2 different generations)
...and so on.
@janbb‘s statement is correct.