Join our GROWING yDNA group! We are interested in all surname variants of the surname Tedder or Tudor in the UK, USA, Canada, Australia or Wales. Name variants welcome are: Tedder, Teader, Teather, Tyther, Tither, Tudor, Tuder, Tutor. We test the male “y” chromosome with a 37-marker yDNA kit. This is also know as the father’s line OR surname line test. Women don’t have this chromosome to test so are welcome to sponsor a father, brother bearing the Tedder or variant surname. This is a simple cheek swab test.