Interlocking fingers – meaning they hold hands so that their palms are pressed together, and each finger rests between two fingers of the other person.

“This way of holding hands shows a great deal of closeness and intimacy. This shows two people who are happiest when they are together and love feeling the other person as closely as possible.

“This is a powerful hold that reassures each partner that the other one has got their back. It’s a trusting, loving, passionate way of holding hands.

Butterfly – meaning each of them rests one hand on the other one or holds one hand of the other, very gently, without pressing or bending any fingers

“This is a very subtle and sensitive hand-holding, showing that the couple shares a lot of trust, and feel no need nor desire to limit the other person.

Clam – meaning one partner is holding the other’s hand, with both their hands, in a clam shape.

“This is a bold gesture of deep connection and reassurance.

“She is showing her husband that she’s happy to share whatever he brings into the relationship.

[https://www.express.co.uk/life-style/life/1738384/Meghan-Markle-gesture-Prince-Harry-hold-hands-techniques-exclusive]