Question: In what month was the man who played Frank Jr. in "The One with the Embryos" born?

Context articles: Harriet Frank Jr.
Killing of Henry Marrow
Jerry Stiller
Billy Frank Jr.
Jason McHugh
David Threlfall
Frank Williams (gridiron football)
Tellis Frank
The One with the Embryos
Giovanni Ribisi

Harriet Frank Jr. (born March 2, 1917) is an American film writer and producer.
 Working alongside her husband, Irving Ravetch, Frank received numerous awards during her lengthy career, including the New York Film Critics Circle Awards and the Writers Guild of America Award, and several nominations.
Henry Dortress "Dickie" Marrow Jr. (January 7, 1947 – May 12, 1970) was 23 when he was killed in Oxford, North Carolina on May 11, 1970.
 A black man in a largely segregated community, Marrow was beaten and shot by whites outside a local store.
 The white proprietor and one of his sons were brought to trial on a charge of murder.
 Their acquittal by an all-white jury spurred rioting and arson in Oxford.
 The black community conducted what became an 18-month boycott of white businesses, which ended after the town agreed to end segregation of public facilities.
 The events in Oxford influenced the broader Civil Rights Movement throughout the United States.
Gerald Isaac Stiller (born June 8, 1927) is an American comedian and actor.
 He spent many years in the comedy team Stiller and Meara with his wife, Anne Meara.
 He later played Frank Costanza on the NBC sitcom "Seinfeld" and Arthur Spooner on the CBS comedy series "The King of Queens".
 Stiller and Meara are the parents of actor Ben Stiller, with whom Stiller co-starred in the films "Zoolander", "Heavyweights", "Hot Pursuit", "The Heartbreak Kid" and "Zoolander 2".
 Stiller is known for his angry, yelling acting style.
Billy Frank Jr. (March 9, 1931 – May 5, 2014) was a Native American environmental leader and treaty rights activist born in 1931 to Willie and Angeline Frank.
 A Nisqually tribal member, Frank is known specifically for his grassroots campaign for fishing rights on the tribe’s Nisqually River, located in Washington state, in the 1960s and 1970s.
 He is also known for promoting cooperative management of natural resources.
Jason McHugh (born October 10, 1968) is an American television producer and actor, best known for his work with Trey Parker and Matt Stone.
 He produced both "Cannibal!
 The Musical" and "Orgazmo" and played Frank Miller in "Cannibal!"
 and part of the porno crew in "Orgazmo".
David Threlfall (born 12 October 1953) is an English stage, film and television actor and director.
 He played Frank Gallagher in Channel 4's series "Shameless".
 He has also directed several episodes of the show.
 In April 2014, he portrayed comedian Tommy Cooper in a television film entitled "".
 In 2014, he starred alongside Jude Law in the thriller "Black Sea".
Frank Williams Jr. (May 29, 1932 – July 13, 2006) was a gridiron football player who played for the BC Lions and Los Angeles Rams.
 His parents were Frank Williams and Elya M. Glenn of Texarkana, TX.
 He was one of four children.
 The nurses wrote his name incorrectly on the certificate, which read, Frank 'Jr.' Williams.
 He actually didn't have a middle name, he was a junior, named after his father, Frank Williams.
 He went by Frank James Williams or Frank J. Williams.
 He played college football at Pepperdine University.
 He was drafted to the Lions right out of Pepperdine.
 He had 6 children; which included Shelia Williams, Casandra Williams, and Michelle Williams.
 He died July 13, 2006, and is buried in Kent, King County, WA at Tahoma National Cemetery.
Tellis Joseph Frank Jr. (born April 26, 1965) is an American former professional basketball player and former assistant coach for the Atlanta Dream of the Women's National Basketball Association (WNBA).
 At 6'10" (2.08 m) and 225 pounds (102 kg) he played as a power forward.
"The One with the Embryos" is the twelfth episode of "Friends"' fourth season.
 It first aired on the NBC network in the United States on January 15, 1998.
 In the episode, Phoebe (Lisa Kudrow) agrees to be the surrogate mother for her brother Frank Jr. (Giovanni Ribisi) and his older wife Alice Knight (Debra Jo Rupp).
 Meanwhile, a display by Chandler (Matthew Perry) and Joey (Matt LeBlanc) of how well they know Monica (Courteney Cox) and Rachel (Jennifer Aniston) by guessing the items in their shopping bag leads to a large-scale bet on a quiz, for which Ross (David Schwimmer) acts as the gamemaster.
Antonino Giovanni Ribisi (] ; born December 17, 1974), known professionally as Giovanni Ribisi, is an American film and television actor.