Relativity was a Scotch-Irish quartet formed in 1985 consisting of two Scottish brothers and an Irish brother and sister. The four members of the band were brothers Phil Cunningham

Phil Cunningham

Phil Cunningham may refer to:*Phil Cunningham , Scottish accordionist with the folk group Silly Wizard*Phil Cunningham , English guitarist, member of New Order, Bad Lieutenant and Marion...

 (fiddle) and John Cunningham

John Cunningham

-Military:* John Cunningham , Group Captain, RAF Night fighter Ace* John Cunningham , East Yorkshire Regiment* John Cunningham , Prince of Wales's Leinster Regiment...

 (accordion, keyboard, whistle, bodhran), from the influential Scottish band Silly Wizard

Silly Wizard

Silly Wizard was a Scottish folk band that began forming in Edinburgh in 1970. The founder members were two like-minded university students—Gordon Jones and Bob Thomas...

, and Irish sister and brother Tríona Ní Dhomhnaill

Tríona Ní Dhomhnaill

Tríona Ní Dhomhnaill is an Irish traditional singer, pianist, and composer, considered one of the most influential female vocalists in the history of Irish music. She is famed for her work with traditional Irish groups such as Skara Brae, The Bothy Band, Relativity, Touchstone, and Nightnoise.-...

 (vocals, clavinet) and Mícheál Ó Domhnaill

Mícheál Ó Domhnaill

Mícheál Ó Domhnaill was an Irish singer, guitarist, and composer, who was a major influence on Irish traditional music in the second half of the twentieth century...

 (vocals, guitar, keyboard) from the influential group The Bothy Band

The Bothy Band

The Bothy Band was an Irish traditional band active during the late 1970s. It quickly gained a reputation as one of the most influential bands playing Irish traditional music...

. Each of the members enjoyed a flourishing solo career at the time Relativity was formed.