My family are called Leyden from Streamstown, County Galway which is a small hamlet near Clifden Co Galway. I have a few records of the area. Trouble is the name changes according to local and immigration records - it often appears as Lyden or Lydon. Good news is that John Lennon of the Beatles and John Lydon of the Sex Pistols are also Galway Leydens. Many Leydens irrespective of spelling left area during famine for mostly Glasgow and Liverpool but also Birmingham, which is obviously near Walsall. If you need more let me know - any names in particular?