“Jesus was blood type AB negative”?

This claim has been widely publicized in the past and even been featured on our page of “people in the public eyes” who are or are said to be or have been rh negative.
So where did this claim originate?

Regarding the Shroud of Turin:

The only evidence that would conclusively authenticate the Shroud against naysayers and claims of forgery is Jesus’ DNA. It would be matched against the blood — type AB — found on the Shroud and considered rare.

Enter the Sudarium of Oviedo. It resides in the Cathedral of Oviedo, in Spain. The Sudarium is a piece of linen cloth, 34 by 21 inches, thought to have been used to cover the head of Jesus immediately after the crucifixion (John 20:7). Unlike the Shroud, the Sudarium does not display an image. The Sudarium contains male blood of type AB, however, which matches the blood on the Shroud. Moreover, the patterns of blood flow on the Sudarium are consistent with those of a crucified man.

And then there was the Miracle of Lanciano where wine supposedly changed into AB blood:

According to Linoli’s study, the flesh is human cardiac tissue of type AB, consistent with the source being of Middle Eastern descent. He said he found proteins in the blood, in the same normal proportions (percentage-wise) as are found in the sero-proteic make-up of normal blood. Linoli found no trace of preservatives.
Some sources claim that Linoli’s study proves that the specimens are miraculous because blood would naturally decay and Linoli’s analysis is based on a comparison with normal (fresh) blood, not thousand-year-old blood. However, others claim that Linoli’s report in fact proves that the blood is old and not fresh blood, which would be consistent with a naturalistic explanation.

As the Catholic Herald interprets it:

Scientific testing on a wide variety of Eucharistic miracles consistently shows human flesh with blood group AB

The AB blood type is rare, but I have also posted a small 1977 study where it had an extremely high frequency amongst the remains of ancient Hebrews:

In 1977, a study determined the ABO blood types of 68 skeletons of Jewish residents from 1,600 to 2,000 years ago in and around Jerusalem. 55 of those findings were diagnosable. And more than half of the ABO blood groups were found to be the otherwise rare AB blood group.