New Zealand's Hadlee brethren (Barry, Dayle and Richard) trios of brothers - all appeared twice against England - at Dunedin in 1974-75 and Nottingham in the 1975 World Cup. Kenya's Obuyos (Collins, David and Kennedy Otieno) have played together 12 times (before March 2003), including the game against Canada in the current World Cup. Three of the five Mohammed brothers, Hanif, Mushtaq and Sadiq, appeared together for Pakistan against New Zealand at Karachi in 1969-70.
Your vote on this answer has already been received
New zealand's hadlees (barry, dayle and richard) all appeared against england in the 1975 world cup and again kenya's obuyos (collins, david and kennedy otieno) all played against canada in the 2003 world cup peace!!!