Is this my ancestral family home?

With the weather being so good, I've not spent much time researching recently, but an email from Mary stirred my interest. She had been contacted by someone from Cumbria who also has Angus connections. She contributes to a website which says that our family history can be traced all the way back to Tantallon Castle in Scotland in the C16th! I need to look at what the website in more detail, but if true, it's certainly an exciting prospect.