A very small number did, relative to their portion of the population (which was large.)
Anti-German sentiment was certainly present in America and the UK during the world wars. In response to Anti-German sentiment, the British royal family anglicized their name during WWI, changing it from House of Saxe-Coburg and Gotha to House of Windsor. In America, German Americans largely stopped speaking German in public (German was the second most common language in America and was spoken particularly often in Pennsylvania, remnants of which can still be seen today in "Pennsylvanian Dutch" culture.) However, treating German Americans as severely as Japanese Americans were treated, at least on the mainland, was probably too impractical to be considered.
Anti-German sentiment was certainly present in America and the UK during the world wars. In response to Anti-German sentiment, the British royal family anglicized their name during WWI, changing it from House of Saxe-Coburg and Gotha to House of Windsor. In America, German Americans largely stopped speaking German in public (German was the second most common language in America and was spoken particularly often in Pennsylvania, remnants of which can still be seen today in "Pennsylvanian Dutch" culture.) However, treating German Americans as severely as Japanese Americans were treated, at least on the mainland, was probably too impractical to be considered.
https://en.wikipedia.org/wiki/German_Americans#The_apparent_...