John Paul McDonagh, 37, of Markfield in Leicestershire, will appear at court this morning charged with one count of attempted murder and one count of grievous bodily harm with intent.
The charges come after an incident which saw three men and a woman stabbed at the Gypsy Lane Caravan Park in Gipsy Lane, near Irchester Country Park, in the early hours of New Year's DayThree other men have also been arrested on suspicion of attempted murder in connection with the incident.
A 19-year-old and a 36-year-old remain in police custody. A 59-year-old has been released on police bail pending further enquiries.
The incident at the caravan park, which has about 20 plots and is owned by the Doherty family, left four people with injuries a police spokesman said were serious but not life-threatening.
One man was taken to University Hospital Coventry with stab wounds to his face and neck and multiple injuries including a broken leg. The female victim was taken to the same hospital with a stab wound to her torso.
Two other men were also transported to Northampton General Hospital with stab wounds.
Witnesses or anyone with information are asked to call Northamptonshire Police on 101, quoting incident number 20000000784.