Ptolemy VI Philometor in Wikipedia
Ptolemy VI Philometor (Greek: Πτολεμαῖος Φιλομήτωρ, Ptolemaĩos Philomḗtōr, ca. 186–145 BC) was a king of Egypt from the Ptolemaic period. He reigned from 180 to 145 BC.
Ptolemy succeeded in 180 at the age of about 6 and ruled jointly with his mother, Cleopatra I, until her death in 176 BC. The following year he married his sister, Cleopatra II.
In 170 BC, Antiochus IV began the sixth Syrian War and invaded Egypt twice. He was crowned as its king in 168, but abandoned his claim on the orders of the Roman Senate.
From 169–164, Egypt was ruled by a triumvirate consisting of Ptolemy, his sister-queen and his younger brother known as Ptolemy VIII Physcon. In 164 he was driven out by his brother and went to Rome to seek support, which he received from Cato. He was restored the following year by the intervention of the Alexandrians and ruled uneasily, cruelly suppressing frequent rebellions.
In 152 BC, he briefly ruled jointly with one of his sons, known as Ptolemy Eupator, but it is thought that Ptolemy Eupator died that same year.
Ptolemy XI Alexander II in Wikipedia
Ptolemy XI Alexander II (Πτολεμαῖος Ἀλέξανδρος, Ptolemaĩos Aléxandros) was a member of the Ptolemaic dynasty who ruled Egypt for a few days in 80 BC.
Ptolemy XI was born to Ptolemy X Alexander and either Cleopatra Selene or Berenice III. Ptolemy IX Lathryos died in 81 BC or 80 BC, leaving no legitimate heir, and so Cleopatra Berenice (another name of Berenice III) ruled alone for a time. However, Rome's Sulla wanted a pro-Roman ruler on the throne, and sent the young son of Ptolemy X to Egypt, displaying Ptolemy Alexander's will in Rome as justification for this obvious intervention.
The will also required Ptolemy XI to marry Cleopatra Berenice, who was his stepmother and half-sister (or possibly his natural mother - the ancient sources are unclear). However, nineteen days after the marriage, Ptolemy murdered his bride for unknown reasons, an unwise move since Berenice was very popular; Ptolemy was immediately lynched by the citizens of Alexandria.
He was succeeded by Ptolemy XII.