To disable Chrome autofill and suggestions in items which have a valid autofill value such as name or email, add autocomplete="nope".
<input type="text" autocomplete="nope" name="email">
In cases where you have previously saved values that are showing dropdown suggestions, for example in a column of numbers in an accounting page, use JS to change the names of the inputs.
<input type="text" data-name="my_inputname">
An example of how you would do this with jQuery:
https://codepen.io/btn-ninja/pen/EBmNQb
In cases where you want the autocomplete to work, here is documentation on valid autocomplete values:
https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/autocomplete