had a peep at the latest census that would show him, and allowing to some extent for spelling, the only 2 close names are in Essex, but both are a tad older than your man. (one a year plus, and the other is aged 8 months in the April of that year)
UPDATED: there is a
MANKETLOW child with no forename shown in an INSTITUTION in TICEHURST - born 1911
let me know if you find out more, perhaps also an immigration date? You can ask for a search on passenger lists
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I assumed from another thread you posted on that Frederick M was born in England.
http://www.rootschat.com/forum/index.php/topic,133338.msg3018313.html#msg3018313The info shown is the English General Records Office Birth Index entry for an individual who is the closest to the date you gave. Births are indexed within a 'quarter' of a year, by District (not actual birthplace), Volume and Page. That info will allow you to order the original paperwork and see full details of parents, place etc.