You just won’t believe some of the names on this list of prominent conservatives and Republicans who want same-sex couples to have the legal right to marriage.

Let’s be honest. The Republican Party has been home to almost if not all of the most anti-gay politicians, religious leaders, activists, and power brokers in America. Which is not to say all Republicans are anti-gay, but when being anti-gay is embedded in the actual text of your party’s platform, there’s little room to claim your party supports equality.

So it should come as both a huge surprise and be viewed as a monumental event that over 300 prominent Republicans, some of whom have publicly spoken out against same-sex marriage or LGBT civil rights, have signed on to an amicus brief sent to the U.S. Supreme Court today.

As TIME points out, the brief states its signers “share the view that laws that bar same-sex couples from the institution of civil marriage, with all its attendant profoundly important rights and responsibilities, are inconsistent with the United States Constitutionâ€™s dual promises of equal protection and due process.”

Who’s on that list?

Here are a few of the more than 300 names:

Ken Mehlman, whose name is listed as the person behind the group of conservatives.

Rudy Giuliani

Charles Koch

Former EBay CEO and GOP nominee for California GovernorÂ Meg Whitman

Retired Gen. Stanley McChrystal

Former Bush Dep. Sec. of Defense Paul Wolfowitz

Former U.S. Senator of Missouri and ordainedÂ Episcopal priestÂ John C. Danforth

Ronald ReaganÂ White House Chief of StaffÂ Kenneth M. Duberstein

Mitt Romney presidential campaign Political Director and former RNC Political DirectorÂ Rich Beeson