Good idea, but it needs WAY WAY more time. Like double.
As someone else says, the answers are obvious, when you see (most of) them, but judging by the average score, people aren’t instantly able to rhyme off all the names that end “son” as soon as they see each letter.
As a native of Sweden, my peformance was poor. Many are english names. And many of the Scadinavian ones are very rare in scandinavia. And also the spelling is different.
As someone else says, the answers are obvious, when you see (most of) them, but judging by the average score, people aren’t instantly able to rhyme off all the names that end “son” as soon as they see each letter.