This is the 4760th most frequent Swedish word.
attunda
"Attunda" means to pay attention to or attend to something.
Here, 'attunda' is used as an ordinal number indicating the eighth district.
Han bor i attunda distriktet.
He lives in the eighth district.
In this sentence, 'attund' denotes that the son is eighth in ordinal birth order.
Kungens son var attund född.
The king's son was the eighth born.
This usage indicates ordinal numbers specific to mathematical concepts, referring to values denoted as eighth.