Yes, longswords are typically considered two-handed weapons. The term "longsword" refers to a type of sword that emerged during the late medieval and Renaissance periods in Europe.

Longswords were characterized by their longer blades, typically ranging from 100 to 130 centimeters (about 39 to 51 inches) in length, and they were designed to be wielded with two hands.

The two-handed grip on a longsword provides several advantages:

1. Increased Control: Using both hands on the hilt allows for better control and maneuverability of the sword. The longer handle provides leverage and balance, enabling the wielder to perform precise and fluid movements.
2. Enhanced Power: Gripping the longsword with two hands allows for greater power generation. The additional strength and leverage from both arms can be utilized for more forceful strikes, cuts, and thrusts.
3. Versatility: The two-handed grip on a longsword enables a wider range of offensive and defensive techniques. It provides the flexibility to perform both one-handed and two-handed strikes, blocks, and parries, depending on the situation.
4. Balance and Stability: Longswords are typically designed with a longer grip to ensure proper weight distribution and balance. This design allows for a stable and controlled handling of the sword.

While longswords are primarily intended for two-handed use, they can also be wielded with one hand, albeit with some limitations in terms of power and control. Historical manuals and treatises on swordsmanship often describe techniques for both one-handed and two-handed use of longswords, depending on the desired effect and the circumstances of combat.

It's worth noting that the specific grip and hand positioning on a longsword can vary depending on the specific martial arts system or historical period being referenced. However, the two-handed grip is generally the standard practice for wielding a longsword effectively.