Christopher Martin, "Mayflower" Passenger - Unknow Parents

I find it rather odd that everything seems to be known about Christopher Martin except for his parents names.

Christopher Martin (c. 1582-1621)

Christopher Martin - Merchant Adventurer (passenger recruited by Thomas Weston, of London Merchant Adventurers)

Wife - Mary (Prowe) Martin
Stepson- Solomon Prowe
Son- Nathaniel Martin
Servant of the merchant adventurer - John Langemore

He was a SIGNATORY OF THE MAYFLOWER COMPACT

In England in was a merchant by trade and there are many records for this man and yet you can't tell me who his parents are?