Is Singed Yorick's Mom?

Singed's "Fling" animation closely resembles that of digging with a shovel. Since Yorick uses a shovel as his weapon of choice, this proves a very strong relationship between the two characters, possibly the two even being relatives. What seals the deal is the line in Yorick's lore: "Some say he was the last of his family line, dying without an heir to continue its legacy, and that he was cursed to continue his family's duty even after death." This proves that Singed cannot be Yorick's sibling nor daughter, which leaves only one explanation: Singed is Yorick's mother.