Spirit Guides are individuals in Spirit who are now guiding you from the Other Side.
Without physical body, they are able to assist you with many things that your friends with physical bodies cannot - such as behind the scenes nudges, indispensable unbiased guidance and support at all and any hour that you need it.
Unlike Angels, a Spirit Guide has generally taken a human, animal or physical existence before now - as now they are assisting you in a non-physical form - in Spirit. And because Spirit Guides are often described as being chosen for you and assigned to you, before your birth, it is generally assumed that you, as a Soul, know many of your Spirit Guides from previous lifetimes. This is the reason why Spirit Guides are often dressed in period clothing from a variety of older time periods, because perhaps, this is the time period from which they came and from which you knew them.
It is also often said that Spirit Guides are not and cannot be deceased Loved Ones that you knew while alive during this time of yours on Earth. And while your deceased Loved Ones, once crossed, can move into a guardianship and mentorship role, they are generally not *technically* Spirit Guides, though, they are guiding you in Spirit. It’s a semantics thing, mostly.
But since your Spirit Guides are generally people who are guiding you in Spirit and in some cases, chosen by you because they were your friends from previous lives, does this mean that Spirit Guides are simply deceased Loved Ones from another time, that is not this one?
Spirit Guides are often deceased Loved Ones from other lifetimes of yours or other lifetimes of theirs, when you were Spirit and they were on Earth. Spirit Guides are often friends and family members from previous lives and ancestors from before you were born into this life.
Which means that your ancestors, your great-great grandparents and family members from the Civil War, can step in and be your Spirit Guides.
The main reason your immediate deceased Loved Ones can generally not be your main Spirit Guides, is because the main catch behind being a Spirit Guide is being able to offer you unbiased support and guidance. Your father, your brother and your mother, because they knew you while on Earth and have their own wishes and desires for you, cannot do that. But, a Spirit Guide, who didn’t know you and have all kinds of preconceived notions of who you are to be on this Earth, can Guide you purely without influencing your life with their own wishes for you.
If you have ancestors that are far enough removed from your immediate family members, that were wise, genuine, loving and are in a place now where they can offer you unbiased guidance and spiritual support - they can fit into the Spirit Guide category.
How far removed does your Spirit Guide ancestor have to be to fit the model?
They generally have to have died well before you were ever born into a physical body and living. That way, you could each choose each other before your lifetime here on Earth, in a completely unbiased way. But remember, there are always exceptions to the rule. If you believe your Loved One is your main Spirit Guide now, while this is a rare occurrence, it is likely so.
In fact, one of my twin sister’s main Spirit Guides is a great-great-great grandfather of ours, who stepped forward for her in a reading to offer to be her Spirit Guide.
She accepted, and you can, too.
I hope this helps!