Tudor and Cashel Wills & Probate Lawyer, Ontario, page 7

A child or spouse who is not mentioned in a will and whom the court believes was accidentally overlooked by the person who made the will. For example, a child born or adopted after the will is made may be deemed a pretermitted heir. If the court determines that an heir was accidentally omitted, that heir is entitled to receive the same share of the estate as she would have if the deceased had died without a will. A pretermitted heir is sometimes called an 'omitted heir.'

An ownership interest in the minerals contained in a particular parcel of land, with or without ownership of the surface of the land. The owner of mineral rights is usually entitled to either take the minerals from the land himself or receive a royalty from the party that actually extracts the minerals.

Taxes some states impose on people or organizations who inherit property from a deceased person's estate. The taxes are based on the value of the inherited property.

A complete listing of all property owned by a deceased person at the time of death. The inventory is filed with the court during probate. The executor or administrator of the estate is responsible for making and filing the inventory.

A surviving spouse's right to receive a set portion of the deceased spouse's estate -- usually one-third to one-half. Dower (not to be confused with a 'dowry') refers to the portion to which a surviving wife is entitled, while curtesy refers to what a man may claim. Until recently, these amounts differed in a number of states. However, because discrimination on the basis of sex is now illegal in most cases, most states have abolished dower and curtesy and generally provide the same benefits regardless of sex -- and this amount is often known simply as the statutory share. Under certain circumstances, a living spouse may not be able to sell or convey property that is subject to the other spouse's dower and curtesy or statutory share rights.

Irrevocable trusts designed to save on estate tax. There are several kinds; with all of them, you keep income from trust property, or use of that property, for a period of years. When the trust ends, the property goes to the final beneficiaries you've named. These trusts are for people who have enough wealth to feel comfortable giving away a substantial hunk of property. They come in three flavors: Grantor-Retained Annuity Trusts (GRATs), Grantor-Retained Unitrusts (GRUTs) and Grantor-Retained Income Trusts (GRITs).