| Honorific Prefix: | Sheikh |
| Abdullah bar Sam | |
| Native Name Lang: | myz |
| Citizenship: | Iraqi |
| Birth Date: | unknown; ? |
| Birth Place: | Qal'at Saleh, Ottoman Iraq |
| Death Date: | 1981 |
| Death Place: | Baghdad, Iraq |
| Other Names: | Adam Zihrun bar Sam |
| Years Active: | until 1981 |
| Occupation: | Mandaean priest |
| Father: | Sam, son of Jabbar |
| Children: | Abdul Jabbar Abdullah |
| Relatives: | Sinan Abdullah (grandson) |
| Religion: | Mandaeism |
| Ganzibra | |
Sheikh Abdullah bar Sam (Arabic: عبدالله ابن سام; born in Qal'at Saleh, Iraq; died 1981, Baghdad, Iraq) was an Iraqi Mandaean priest. He is known as the priestly initiator of Jabbar Choheili and Salah Choheili, as well as the father of physicist Abdul Jabbar Abdullah.[1]
Abdullah bar Sam was born into the Manduia and ‛Kuma families in Qal'at Saleh, Iraq, probably sometime just before the turn of the 20th century. His father's name was the Ganzibra Sam, son of Sheikh Jabbar. Abdullah bar Sam's Mandaean baptismal name was Adam Zihrun bar Sam (ࡀࡃࡀࡌ ࡆࡉࡄࡓࡅࡍ ࡁࡓ ࡎࡀࡌ|translit=Adam Zihrun br Sam).
Ganzibra Abdullah copied the Ginza Rabba by hand in 1928; as of 2010, that copy of the Ginza Rabba belonged to the Elmanahi family in New York state, United States.[2]
In 1948, he initiated Jabbar Choheili from Ahvaz, Iran into the priesthood.[2] In 1976, he initiated Jabbar Choheili's son Salah Choheili as a tarmida at the Mandi of Dora, Baghdad.[3]
His son Abdul Jabbar Abdullah (1911–1969) was a well-known physicist and meteorologist, while his grandson is Sinan Abdullah.[1] [4]