[Vwoolf] Pllural of "Woolf"?

[Jean Mallinson]

Reading Bill Goldstein's The Wold Broke in Two, his recent book about 
Virginia Woolf, T.S. Eliot, D.H. Lawrence and E.M Forster and the "Year 
that changed Literature, I find my  interest engaged by new or forgotten 
information and fresh insights into the writing lives of these loved and 
familiar figures but I am disturbed by a small detail: he uses 
"Woolves", not "Woolfs",  as the plural of "Woolf"    -- not in jest but 
seriously. Am I right in wincing every time I read this? How could an 
attentive editor not have noticed and corrected this?

Jean  M.