Two of the three Perea members that have been tested have come out Haplogroup J2.

Perea - J2: Semitic Origin. Mostly found in the Middle East, Mediterranean, and North Africa. This haplogroup contains the Cohen modal lineage which is found in about 5% of those with this origin. Sephardic Jews and Arab Moors belong to this Haplogroup and they were among the earliest settlers of Spain. About 28% of Sephardic Jews have this origin. 3% of modern day Spaniards have J, J1, or J2 origin.

The third Perea member that has been tested has come out Haplogroup I.

Perea - I: Nordic (Northwestern European) origin. In 409 AD, the Suebi (a Baltic people) and the Vandals (an Eastern Germanic people) established themselves on the Iberian Peninsula. Less than 100 years later the Visigoths (an Eastern Germanic people) conquered Iberia, after they had conquered Rome, and settled there in the year 507 AD. The Visigoths ancient homeland was Sweden, which they had left around Christ's time. These three Nordic peoples brought Haplogroup I and sub-haplogroups I1 and I2 into Iberia. 13% of modern day Spaniards share this origin.

The three Perea members did not match one another. From this one can conclude that there are more then one genetic line of Pereas in the New World.

Seventeen of the twenty nine Pereira members that have been tested have come out Haplogroup R1b1.

Pereira - R1b1: Western European origin. This lineage is also the haplogroup containing the Atlantic modal haplotype. Basque and Celtic people belong to this Haplogroup and they were among the earliest settlers of Portugal. 62% of modern day Northern Portuguese share this origin. The following markers are common to the people bordering Europe's Atlantic within a couple of steps; DYS19 (DYS394)=14, DYS388=12, DYS390=24, DYS391=11, DYS392=13 and DYS393=13.

Four of the twenty nine Pereira members that have been tested have come out Haplogroup E1b1b.

Pereira - E1b1b: Mediterranean origin. Mostly found in the Mediterranean, Southern Europe, the Middle East, North, West, and East Africa. The Phoenicians, the Greeks, and the Romans belong to this Haplogroup and they were among the earliest settlers of Spain. 15% of modern day Portugese share this origin.

Two of the twenty nine Pereira members that have been tested have come out Haplogroup J2.

Pereira - J2: Semitic origin. Mostly found in the Middle East, Mediterranean, and North Africa. This haplogroup contains the Cohen modal lineage which is found in about 5% of those with this origin. Sephardic Jews and Arab Moors belong to this Haplogroup and they were among the earliest settlers of Portugal. About 28% of Sephardic Jews have this origin. 6% of modern day Northern Portuguese have J, J1, or J2 origin. 

Two of the twenty nine Pereira members that have been tested have come out Haplogroup G2.

Pereira - G2: Caucasus of Europe. This is a fairly rare haplogroup found mostly in men from the Mediterranean, the Caucasus, and the Middle East. The highest concentration of Haplogroup G men is found today in the Caucasus Mountains, in several small states to the south of Russia, and in Georgia, Armenia, and Azerbaijan. The G2 branch of this lineage (containing the P15 mutation) is found most often in Europe and the Middle East. The Alan Sarmatians were military allies of the Vandals and the Suebi during the conquest of Iberia, it is likely this is the origin of haplogroup G2 in Portugal. The Alan Sarmatians' ancient homeland was the Caucasus Mountains. 5% of modern day Portuguese share this origin.

Two of the twenty nine Pereira members that have been tested have come out Haplogroup R1a1.

Pereira - R1a1: Eastern European origin. The R1a lineage is believed to have originated in the Eurasian Steppes north of the Black & Caspian Seas. This lineage is thought to descend from a population of the Kurgan culture, known for the domestication of the horse (circa 3000 B.C.E.). These people were also believed to be the first speakers of the Indo-European language group. This lineage is found in central & western Asia, India, and in Slavic populations of Europe. Slavonic mercenaries were used by the Moors in the second half of the 9th Century, it is likely this is the origin of haplogroup R1a in Iberia. 2% of modern day Portugese share this origin.

The twenty eighth Pereira member that has been tested has come out Haplogroup I2a2.

Pereira - I2a2: Balkans of Europe. In 409 AD, the Suebi (a Baltic people) and the Vandals (an Eastern Germanic people) established themselves on the Iberian Peninsula. Less than 100 years later the Visigoths (an Eastern Germanic people) conquered Iberia, after they had conquered Rome, and settled there in the year 507 AD. The Visigoths ancient homeland was Sweden, which they had left around Christ's time. These three Nordic peoples brought Haplogroup I and sub-haplogroups I1 and I2 into Iberia. 15% of modern day Portugese share this origin. I2a is found predominately in the Balkans where it probably mutated from "I". It is also found significantly in Sardinia and the Basque country of Spain (I2a2).

The twenty ninth Pereira member that has been tested has come out Haplogroup H.

Pereira - H: Indian Orgin. The founding mutation for Haplogroup H, M69, occurred in a Haplogroup F man, probably in the Indian subcontinent. The founder of Haplogroup H probably lived about 30,000-40,000 years ago. This haplogroup has not yet been studied in a comprehensive manner. Today, nearly all members of Haplogroup H live in the Indian subcontinent area. The Roma (also known as Gypsy) people, who apparently originated in India, are the main source of Haplogroup H in Western Europe.

The twenty nine Pereira members did not match one another. From this one can conclude that there are more then one genetic line of Pereiras in the New World.

The first Pereyra member that has been tested has come out Haplogroup R1a1.

Pereyra - R1a1: Eastern European origin. The R1a lineage is believed to have originated in the Eurasian Steppes north of the Black & Caspian Seas. This lineage is thought to descend from a population of the Kurgan culture, known for the domestication of the horse (circa 3000 B.C.E.). These people were also believed to be the first speakers of the Indo-European language group. This lineage is found in central & western Asia, India, and in Slavic populations of Europe. Slavonic mercenaries were used by the Moors in the second half of the 9th Century, it is likely this is the origin of haplogroup R1a in Iberia. 2% of modern day Portugese share this origin.

The first Perera member that has been tested has come out Haplogroup R1b1.

Perera - R1b1: Western European origin. This lineage is also the haplogroup containing the Atlantic modal haplotype. Basque and Celtic people belong to this Haplogroup and they were among the earliest settlers of Spain. 68% of modern day Spaniards share this origin. The following markers are common to the people bordering Europe's Atlantic within a couple of steps; DYS19 (DYS394)=14, DYS388=12, DYS390=24, DYS391=11, DYS392=13 and DYS393=13.