The four were charged after an incident on June 11 in in Peacock Hill Close, Grimsargh.
Preston Crown Court was told following a previous dispute, defendant Caine Lee Hill, 23, of Towneley Road West, Longridge, Preston, found out where his co-defendant Jak Kimberley, 25, lived.
He attended his then address on Peacock Hill Close accompanied by his mum, Jane Lomas and dad Gary Hill, who had a weapon.
Violence broke out and Caine Hill and his parents, along with Jak Kimberley and his parents, all suffered injuries of varying degrees.
Lomas then threw an item at Kimberley's dad's van, which was parked on the drive, in anger.
Caine Hill received a black eye, bruising and had part of his ear bitten off
Jak Kimberley's father suffered a broken finger and his mother had a small cut to her head
Jane Lomas received bruising to her face and Gary Hill received bruising to his body
Caine Hill and Jak Kimberley, now of Lovett Road, Deepdale, Preston, were both jailed for 18 months after they pleaded guilty to affray.
Gary Michael Hill, 47, of Towneley Road West, Longridge, admitted possessing an offensive weapon - a tyre iron - and was given six months, suspended for year, with 100 hours unpaid work.
Jane Lomas, 43, also of Towneley Road West, Longridge, Preston, admitted causing Â£249 damage to a Volkswagen Caddy and was sentenced at a separate hearing in October to a 20 month conditional discharge and ordered to pay compensation.