Question: Which rock band was founded by two brothers, Pedro the Lion or Half Japanese?

Context paragraphs:
Half Japanese: Half Japanese is an art punk band formed by brothers Jad and David Fair around 1975, sometime after the family's relocation to Uniontown, Maryland.  Their original instrumentation included a small drum set, which they took turns playing; vocals; and an out-of-tune, distorted guitar.  Both Fair brothers sang, although over time Jad moved into the frontman role.  The band members are John Sluggett - guitar, Gilles-Vincent Rieder - drums, Jason Willett - bass, Mick Hobbs - guitar, and Jad Fair - vocals and guitar.

Achilles Heel (album): Achilles Heel (also known as Pedro the Lion's Achilles Heel) is the fourth and final album by indie rock band Pedro the Lion.  It was released on May 25, 2004, on Jade Tree Records.  The cover artwork was by Jesse LeDoux.  It reached #26 on the Top Heatseekers and #24 on the Top Independent Albums charts.

Thick Syrup Records: Thick Syrup Records is an independent record label from Little Rock, Arkansas.  Founded by Travis McElroy in 2006, it specializes in indie rock and underground music.  It has released the work of known acts such as Matt Cameron, Jad Fair from Half Japanese, Bob Bert of Sonic Youth, Penn Jillette, Don Fleming and Velvet Monkeys.  The label also releases compilation albums with multiple artists.

Rapider Than Horsepower: Rapider Than Horsepower is an indie rock band from Indiana, United States.  Rapider Than Horsepower’s ouvre is most easily recognized by their singer’s transcendently nasal quality.  Where The Mae Shi (with whom they shared a split EP), Fat Day or Half Japanese snap, RTH’s brand of geek-rock buckles; they lie at a crossroads between nerdy noise rock and spazz pop, bizarre funk and bizarre-er power balladry.

The Band That Would Be King: The Band That Would Be King is the seventh album released by the Maryland rock group Half Japanese.  It is also their third and last studio album released on their label, 50 Skidillion Watts.

Greatest Hits (Half Japanese album): Greatest Hits is the first compilation album released by the punk rock band Half Japanese, in 1995.  It includes the line ups from all albums released by the band.

50 Skidillion Watts: 50 Skidillion Watts, also known as "50,000,000,000,000,000,000,000,000,000,000 Watts Records", was the label used by brothers David and Jad Fair of the punk rock band Half Japanese to release their first albums recorded in the late 1970s.

The Avett Brothers: The Avett Brothers are an American folk rock band from Mount Pleasant, North Carolina.  The band is made up of two brothers, Scott Avett (banjo, lead vocals, guitar, piano, kick-drum) and Seth Avett (guitar, lead vocals, piano, hi-hat) along with Bob Crawford (double bass, electric bass, violin, backing vocals) and Joe Kwon (cello, backing vocals).  Mike Marsh (drums) and Tania Elizabeth (violin, backing vocals) are touring members of the band.

Del Castillo: Del Castillo is a Latin rock band based in Austin, Texas.  The band's name comes from the last name of two brothers, Rick and Mark del Castillo, who founded the group.

Pedro the Lion: Pedro the Lion is an indie rock band from Seattle, Washington.  David Bazan formed the band in 1995 and represented its main creative force, backed by a varying rotation of collaborating musicians.  In 2006 Pedro the Lion was dissolved as Bazan went solo.  Releasing four full-length albums and five EPs over 11 years, the band is known for its first person narrative lyrics with political and religious themes.

Supporting paragraphs: Pedro the Lion Half Japanese
Answer: Half Japanese