Yes, it could be an error. No data source is free of errors, and the SSA data are no exception to this.
There are some known errors in the SSA data set:
The great baby name glitch of 1969, putting Alexandr (Alexandra trunkated to 8 characters) in the female charts, see
http://www.nancy.cc/2007/11/08/the-great-baby-name-glitch-of-1989-christop-alexandr-elizabet/
A lot of Koreans born in Kansas (coding error, KA mistaken as a state code), see
http://www.nancy.cc/2015/07/24/glitch-alert-korea-coded-kansas-ssa-data/
There are also non-names occurring in the data, like Unnamed, Notnamed, Unknown, Infant, Girl, Boy, Babygirl, or Babyboy.
There are probably more known errors.
This message was edited 12/11/2019, 8:24 AM