"Unknown Lloyd" is the father of Edward and Cornelius Lloyd, brothers. Nothing else whatseover is known about this man.
We know that Cornelius was born in 1608, the brother of Lloyd, Edward I (c.1620-1696), merchant and planter, who was born c.1620, perhaps in Wales.  Other than his older brother Cornelius, nothing is known of his parents or any other siblings, nor of his life prior to his emigration by 1636 to the Virginia colony. 
The birth year of the father, 1570, is a guess, which would have him age 38 when Cornelius was born. We do not know if Edward was younger or older.
The death year of the father, 1630, is another pure guess.
When research identifies the actual father of these two brothers, the guesswork can be revised!
↑ Biographical Dictionary, 2:534 Birth date given as c.1620, but this may be too late as Lloyd patented land in 1636, when he would have been only c.16 years old. Brother Cornelius born in 1608. Family tradition states that the Lloyds came from Wales; place names associated with them (Severn, Wye, and Tred Avon rivers, Hier Dier Lloyd patent, and others suggest a Welsh background); the family uses a coat of arms of Welsh origin. No definitive connection ever documented, however. Cited by Russo.