It’s possible to sigilize name and surname with Chaos or RoseCross method.
In another one, you use this table
(terra=earth, aria=air, acqua=water, fuoco=fire)
What I do on PC is to cancel the useless letters as well as the various lines; then one has to draw lines between all the letters appearing in each elemental “subtable” (e. g. John: a line from J to O, another one from J to H, from H to N…). Finally, each letter should be joined across all those subtables, example: earth J with water J, air J and so on, fire O with earth O, etc.