While California has the largest number of people of Scottish ancestry, the largest concentrations are in the Southern US, according to census figures. Nearly 15 million Americans claim Scottish ancestry. 40% of those living in Southern states claim some Scottish ancestry. About a quarter of a million Scots arrived in the colonies between 1715 and 1776 and settled in Maryland, Pennsylvania, Delaware, Virginia, the Carolinas and later moved to Georgia, Alabama, Tennessee, Kentucky and Arkansas. In the late 1800s a second wave of Scottish immigrants settled in industrial centers on the East Coast (e.g. Andrew Carnegie and Alexander Graham Bell). There is a high density of Scottish place names in the Washington, DC metro area and into Virginia suggesting heavy Scottish influence. North Carolina is also replete with Scottish place names. It is generally thought that Appalachian states have strong Scottish roots, evidenced by frequency of Scottish surnames and music (flings, reels and fiddle playing tradition) along that spine of mountains. Of course the US is a very mobile nation now, and these areas of concentration have dispersed significantly.