Your grandmother, Lena Belle (Johnson) Wixtead left the United States and moved back to Nova Scotia, Canada in the 1930s. She reportedly remarried and died in Nova Scotia, Canada around 1941.
Unidentified Wixtead grave at Our Lady of Calvary Cemetery in Yarmouth, Nova Scotia.
This is unlikely to be Lena’s grave, if she remarried. Thomas E. Wixtead was, according to his death certificate, interred at St. Ambrose cemetery, but there is no record of his grave there.
So we don’t know who this Wixtead might be for sure.