Adding one Datatable data to another

Question

I have a DataTable which contain only one column data1 and many rows. Like

abc

123

def

456

ghi

Now I want another DataTable with two Columns Name and Number . Like

abc	123
def	456
ghi	789

 
I want data in DataTable two be inserted from DataTable one as above. I have no idea how to do that. Any help please