Peperomia - an indoor plant. Or tropical I guess. I've never thought about where it came from, I confess.

I think this is Peperomia obtusifolia variegata, you might Google that name and see if pictures compare to yours. There are many new variegated varieties of P. obtusifolia as well as P. magnoliifolia on the market these days.

All peperomias of this type are easy to grow, just wait until the top inch or so of potting soil is dry before watering well. When the plants get too tall or floppy, take tip cuttings of 4 to 5 inches, cut the bottom few leaves away and plant in potting soil to root. Or you can root them in water.

If you plant a leaf, with petiole or not, it will also produce a new plant but it will not be variegated. It will be a reversion back to the original plain green species which is a beautiful plant in it's own right.

I have one like yours that was my grandmother's, and is well over 60 years old.

Russ