Per Degaton and Monarch are both villainous time travelers in DC Comics lore. They popped in DC Comics’ Convergence #3 (full spoilers here) and are expected to be seen in Convergence #4, in the preview too, as well as Convergence: Booster Gold #1 and #2 with all of the multiverse’s other displaces time travelers. Below are some of the panels with Per Degaton and Monarch for last week’s Convergence.
Spoilers follow.
Shakira and Deimos are explored / explained further here and here respectively in case you are interested.
Per Degaton has a history of tangling with the Justice Society of America, All Start Squadron and Infinity Inc. More recently Per Degaton allied with other villainous time travelers to for the Time Stealers and they tangled with Booster Gold, Rip Hunter and the Time Masters.
While Monarch was most associated with the Armageddon 2001 event and is a hero turned villain; that’s a bit controversial and explained the last image on the right attached below.
Who’s Who in the DC Universe bios / entries for Per Degaton and Monrach are the first two images below.
Depending on your DC Comics comic book era, Monarch is either Hawk (of Hawk and Dove infamy) or Captain Atom. Their DC Comics Encyclopedia bios / entries are below.
Convergence #4 hits stands on April 29, 2015 as does Convergence: Booster Gold #1.