Identical messages were left on my service for both 281-207-4857 and 281-207-4890. It was a recorded message for a meeting for our alternative high school in the area and that there was an information meeting .
Assuming that they are your parents (first) cousins, then they are your first cousins once removed. Their children will be your second cousins. If you are asking what to call them, then that depends. I always called my parents cousins aunty and uncle... unless they were like my age.
The children of first cousins are second cousins to one another, while their children are third cousins. The child of a first cousin and the child of a second cousin would be third cousins. These titles can become even more complicated with stepfamilies and remarriages.