mother or grandmorth and child

HI THESE ARE MY FAMILY NAME, FATHER SIDE LAKE,READ VALENTINE, PEABODY AND THE LIST CAN GO ON, MOTHERSIDE, MACDONALD,BEAN, FRENCH, TUCKER,CHELLEY AND THE SAME HERE. I have been work on my family for a long time i have to brick wall`s lake and macdonald, other surname`s are read,valentine, young bean french tucker and the list go`s on in most case`s i have got back as far as 1600`s and know the area`s in scotland and irish were a few have come from.
Still searching on who g grandmother is on my Lake side have my Great Grandfather death certificate with Bertha Remington listed as his mother And another certificate from MA where he was buried with Eleanor Williams listed as his mother with my Grandfather Llewelyn Lake Signature on the Document Even having my DNA done so far nothing has brought me to the mystery of this family