Here's how Hattie Mae LAU CROWL is related to the Christian LAU that came to America in 1732:
Christian LAU (married Anna Cleophe FREY) ...son Peter LAU (married Susannah NESS) ...son Andrew LAU (married Elizabeth AMOLET) ...son Christian LAU (married Rosanna ZIEGLER) ...son Peter LAU (married Eliza Ann GENTZLER) ...daughter Hattie Mae LAU (married Raymond David CROWL)
Also, Raymond David CROWL is the son of Lewis CROWL and Mary Elizabeth BROWN.The 1910 census shows Raymond worked as a laborer at a stone quarry, and the 1920 census shows he did lime burning as an occupation.His children were Donald L. (b. 13/May/1905) and Mildred Naomi (b. 17/Mar/1912), although the 1910 census indicated that Mary bore other children who didn't survive.
I found all of this information on Ancestry.com... so you might consider getting a subscription to do more digging, especially if you don't live in Cumberland County to search the records yourself.