Seven suicides plus one attempted suicide.
Abimelech (Judges 9:54) - Dying of a skull fracture during a siege ordered his armour-bearer to slay him.
Samson (Judges 16:26-31) - Killed himself to avoid being 'made sport of' by the Philistines.
Saul (1Samuel 31:3-6) - Wounded and defeated in the battle with the Philistines, asked his armour-bear to kill him. When he refused, Saul fell on his own sword. The armour-bearer did likewise.
Ahithophel (2Samuel 17:1,23) - Plotted to overthrow David. When his plan failed, he hanged himself.
Zimri (1 Kings 16:18) - Usurped the throne of {Israel;} when he failed, he burned down the palace around himself.
Judas Iscariot (Matthew 27:4-5) - Hung himself after betraying Jesus.
Attempted suicide-The jailer at Philippi (Acts 16:26-29)- Under the mistaken belief that all his prisoners had escaped during an earthquake, thought that his career and life were in jeopardy and prepared to fall on his sword. Paul stopped him.
https://bible.org/illustration/seven-suicides-bible